50978669 has 6 divisors (see below), whose sum is σ = 59301774. Its totient is φ = 43695960.

The previous prime is 50978647. The next prime is 50978671. The reversal of 50978669 is 96687905.

It can be written as a sum of positive squares in only one way, i.e., 36156169 + 14822500 = 6013^2 + 3850^2 .

It is not a de Polignac number, because 50978669 - 2¹⁶ = 50913133 is a prime.

It is a super-2 number, since 2×50978669² = 5197649386023122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50978269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 520142 + ... + 520239.

It is an arithmetic number, because the mean of its divisors is an integer number (9883629).

Almost surely, 2^50978669 is an apocalyptic number.

It is an amenable number.

50978669 is a deficient number, since it is larger than the sum of its proper divisors (8323105).

50978669 is a wasteful number, since it uses less digits than its factorization.

50978669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040395 (or 1040388 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 50978669 is about 7139.9348036239. The cubic root of 50978669 is about 370.7912674190.

The spelling of 50978669 in words is "fifty million, nine hundred seventy-eight thousand, six hundred sixty-nine".