51779599 has 2 divisors, whose sum is σ = 51779600. Its totient is φ = 51779598.

The previous prime is 51779489. The next prime is 51779621. The reversal of 51779599 is 99597715.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51779599 - 2⁹ = 51779087 is a prime.

It is a super-2 number, since 2×51779599² = 5362253745201602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51779899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25889799 + 25889800.

It is an arithmetic number, because the mean of its divisors is an integer number (25889800).

Almost surely, 2^51779599 is an apocalyptic number.

51779599 is a deficient number, since it is larger than the sum of its proper divisors (1).

51779599 is an equidigital number, since it uses as much as digits as its factorization.

51779599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 893025, while the sum is 52.

The square root of 51779599 is about 7195.8042635969. The cubic root of 51779599 is about 372.7230296580.

The spelling of 51779599 in words is "fifty-one million, seven hundred seventy-nine thousand, five hundred ninety-nine".