50919997 has 4 divisors (see below), whose sum is σ = 51161536. Its totient is φ = 50678460.

The previous prime is 50919983. The next prime is 50920013. The reversal of 50919997 is 79991905.

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 a de Polignac number, because none of the positive numbers 2^k-50919997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50919997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50919917) 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, 120453 + ... + 120874.

It is an arithmetic number, because the mean of its divisors is an integer number (12790384).

Almost surely, 2^50919997 is an apocalyptic number.

It is an amenable number.

50919997 is a deficient number, since it is larger than the sum of its proper divisors (241539).

50919997 is a wasteful number, since it uses less digits than its factorization.

50919997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241538.

The product of its (nonzero) digits is 229635, while the sum is 49.

The square root of 50919997 is about 7135.8248997576. The cubic root of 50919997 is about 370.6489633464.

The spelling of 50919997 in words is "fifty million, nine hundred nineteen thousand, nine hundred ninety-seven".