50001997 has 4 divisors (see below), whose sum is σ = 50016960. Its totient is φ = 49987036.

The previous prime is 50001979. The next prime is 50002009. The reversal of 50001997 is 79910005.

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 50001997 - 2²³ = 41613389 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 (50001197) 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, 78 + ... + 10000.

It is an arithmetic number, because the mean of its divisors is an integer number (12504240).

Almost surely, 2^50001997 is an apocalyptic number.

It is an amenable number.

50001997 is a deficient number, since it is larger than the sum of its proper divisors (14963).

50001997 is an equidigital number, since it uses as much as digits as its factorization.

50001997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14962.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 50001997 is about 7071.2090196797. The cubic root of 50001997 is about 368.4080544727.

The spelling of 50001997 in words is "fifty million, one thousand, nine hundred ninety-seven".