55555679 has 2 divisors, whose sum is σ = 55555680. Its totient is φ = 55555678.

The previous prime is 55555651. The next prime is 55555681. The reversal of 55555679 is 97655555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55555679 - 2¹² = 55551583 is a prime.

It is a Sophie Germain prime.

Together with 55555681, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55555579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777839 + 27777840.

It is an arithmetic number, because the mean of its divisors is an integer number (27777840).

Almost surely, 2^55555679 is an apocalyptic number.

55555679 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555679 is an equidigital number, since it uses as much as digits as its factorization.

55555679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1181250, while the sum is 47.

The square root of 55555679 is about 7453.5682058998. The cubic root of 55555679 is about 381.5716968015.

The spelling of 55555679 in words is "fifty-five million, five hundred fifty-five thousand, six hundred seventy-nine".