49757721 has 8 divisors (see below), whose sum is σ = 71447040. Its totient is φ = 30620112.

The previous prime is 49757699. The next prime is 49757783. The reversal of 49757721 is 12775794.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49757721 - 2⁵ = 49757689 is a prime.

It is a super-2 number, since 2×49757721² = 4951661598227682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (49757791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637881 + ... + 637958.

It is an arithmetic number, because the mean of its divisors is an integer number (8930880).

Almost surely, 2^49757721 is an apocalyptic number.

It is an amenable number.

49757721 is a deficient number, since it is larger than the sum of its proper divisors (21689319).

49757721 is a wasteful number, since it uses less digits than its factorization.

49757721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275855.

The product of its digits is 123480, while the sum is 42.

The square root of 49757721 is about 7053.9152957772. The cubic root of 49757721 is about 367.8071438483.

The spelling of 49757721 in words is "forty-nine million, seven hundred fifty-seven thousand, seven hundred twenty-one".