51779087 has 2 divisors, whose sum is σ = 51779088. Its totient is φ = 51779086.

The previous prime is 51779053. The next prime is 51779089. The reversal of 51779087 is 78097715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51779087 - 2¹⁸ = 51516943 is a prime.

Together with 51779089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51779089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25889543 + 25889544.

It is an arithmetic number, because the mean of its divisors is an integer number (25889544).

Almost surely, 2^51779087 is an apocalyptic number.

51779087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51779087 is an equidigital number, since it uses as much as digits as its factorization.

51779087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 51779087 is about 7195.7686872217. The cubic root of 51779087 is about 372.7218011509.

The spelling of 51779087 in words is "fifty-one million, seven hundred seventy-nine thousand, eighty-seven".