51787677 has 4 divisors (see below), whose sum is σ = 69050240. Its totient is φ = 34525116.

The previous prime is 51787669. The next prime is 51787721. The reversal of 51787677 is 77678715.

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 not a de Polignac number, because 51787677 - 2³ = 51787669 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 (51787607) 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, 8631277 + ... + 8631282.

It is an arithmetic number, because the mean of its divisors is an integer number (17262560).

Almost surely, 2^51787677 is an apocalyptic number.

It is an amenable number.

51787677 is a deficient number, since it is larger than the sum of its proper divisors (17262563).

51787677 is a wasteful number, since it uses less digits than its factorization.

51787677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17262562.

The product of its digits is 576240, while the sum is 48.

The square root of 51787677 is about 7196.3655410214. The cubic root of 51787677 is about 372.7424111656.

The spelling of 51787677 in words is "fifty-one million, seven hundred eighty-seven thousand, six hundred seventy-seven".