51986677 has 2 divisors, whose sum is σ = 51986678. Its totient is φ = 51986676.

The previous prime is 51986657. The next prime is 51986681. The reversal of 51986677 is 77668915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44809636 + 7177041 = 6694^2 + 2679^2 .

It is a cyclic number.

It is not a de Polignac number, because 51986677 - 2²³ = 43598069 is a prime.

It is a super-2 number, since 2×51986677² = 5405229171004658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51986677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51986617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25993338 + 25993339.

It is an arithmetic number, because the mean of its divisors is an integer number (25993339).

Almost surely, 2^51986677 is an apocalyptic number.

It is an amenable number.

51986677 is a deficient number, since it is larger than the sum of its proper divisors (1).

51986677 is an equidigital number, since it uses as much as digits as its factorization.

51986677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The square root of 51986677 is about 7210.1787079101. The cubic root of 51986677 is about 373.2192358781.

The spelling of 51986677 in words is "fifty-one million, nine hundred eighty-six thousand, six hundred seventy-seven".