49999957 has 4 divisors (see below), whose sum is σ = 57142816. Its totient is φ = 42857100.

The previous prime is 49999921. The next prime is 49999991. The reversal of 49999957 is 75999994.

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 49999957 - 2¹⁵ = 49967189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49999895 and 49999904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999757) 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, 3571419 + ... + 3571432.

It is an arithmetic number, because the mean of its divisors is an integer number (14285704).

Almost surely, 2^49999957 is an apocalyptic number.

It is an amenable number.

49999957 is a deficient number, since it is larger than the sum of its proper divisors (7142859).

49999957 is an equidigital number, since it uses as much as digits as its factorization.

49999957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7142858.

The product of its digits is 8266860, while the sum is 61.

The square root of 49999957 is about 7071.0647713057. The cubic root of 49999957 is about 368.4030442551.

The spelling of 49999957 in words is "forty-nine million, nine hundred ninety-nine thousand, nine hundred fifty-seven".