49391957 has 4 divisors (see below), whose sum is σ = 49406016. Its totient is φ = 49377900.

The previous prime is 49391939. The next prime is 49392011. The reversal of 49391957 is 75919394.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 49391957 - 2⁶ = 49391893 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 (49391917) 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, 3332 + ... + 10482.

It is an arithmetic number, because the mean of its divisors is an integer number (12351504).

Almost surely, 2^49391957 is an apocalyptic number.

It is an amenable number.

49391957 is a deficient number, since it is larger than the sum of its proper divisors (14059).

49391957 is an equidigital number, since it uses as much as digits as its factorization.

49391957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14058.

The product of its digits is 306180, while the sum is 47.

The square root of 49391957 is about 7027.9411636695. The cubic root of 49391957 is about 366.9036887154.

The spelling of 49391957 in words is "forty-nine million, three hundred ninety-one thousand, nine hundred fifty-seven".