49077781 has 4 divisors (see below), whose sum is σ = 49120864. Its totient is φ = 49034700.

The previous prime is 49077737. The next prime is 49077811. The reversal of 49077781 is 18777094.

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 49077781 - 2⁹ = 49077269 is a prime.

It is a super-2 number, since 2×49077781² = 4817257175767922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49177781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19785 + ... + 22126.

It is an arithmetic number, because the mean of its divisors is an integer number (12280216).

Almost surely, 2^49077781 is an apocalyptic number.

It is an amenable number.

49077781 is a deficient number, since it is larger than the sum of its proper divisors (43083).

49077781 is a wasteful number, since it uses less digits than its factorization.

49077781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43082.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 49077781 is about 7005.5535826942. The cubic root of 49077781 is about 366.1240907226.

The spelling of 49077781 in words is "forty-nine million, seventy-seven thousand, seven hundred eighty-one".