49002991 has 4 divisors (see below), whose sum is σ = 49021632. Its totient is φ = 48984352.

The previous prime is 49002983. The next prime is 49003001. The reversal of 49002991 is 19920094.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49002991 - 2³ = 49002983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49002931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4570 + ... + 10903.

It is an arithmetic number, because the mean of its divisors is an integer number (12255408).

Almost surely, 2^49002991 is an apocalyptic number.

49002991 is a deficient number, since it is larger than the sum of its proper divisors (18641).

49002991 is a wasteful number, since it uses less digits than its factorization.

49002991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18640.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 49002991 is about 7000.2136395970. The cubic root of 49002991 is about 365.9380164177.

The spelling of 49002991 in words is "forty-nine million, two thousand, nine hundred ninety-one".