49909817 has 4 divisors (see below), whose sum is σ = 50971776. Its totient is φ = 48847860.

The previous prime is 49909813. The next prime is 49909819. The reversal of 49909817 is 71890994.

49909817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49909817 - 2² = 49909813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 1061911 = 49909817 / (4 + 9 + 9 + 0 + 9 + 8 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49909813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530909 + ... + 531002.

It is an arithmetic number, because the mean of its divisors is an integer number (12742944).

Almost surely, 2^49909817 is an apocalyptic number.

49909817 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

49909817 is a deficient number, since it is larger than the sum of its proper divisors (1061959).

49909817 is a wasteful number, since it uses less digits than its factorization.

49909817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061958.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 49909817 is about 7064.6880327443. The cubic root of 49909817 is about 368.1815252237.

The spelling of 49909817 in words is "forty-nine million, nine hundred nine thousand, eight hundred seventeen".