55958879 has 2 divisors, whose sum is σ = 55958880. Its totient is φ = 55958878.

The previous prime is 55958827. The next prime is 55958897. The reversal of 55958879 is 97885955.

Together with next prime (55958897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55958879 is a prime.

It is a super-2 number, since 2×55958879² = 6262792277873282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55958479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27979439 + 27979440.

It is an arithmetic number, because the mean of its divisors is an integer number (27979440).

Almost surely, 2^55958879 is an apocalyptic number.

55958879 is a deficient number, since it is larger than the sum of its proper divisors (1).

55958879 is an equidigital number, since it uses as much as digits as its factorization.

55958879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 56.

The square root of 55958879 is about 7480.5667566034. The cubic root of 55958879 is about 382.4925688106.

The spelling of 55958879 in words is "fifty-five million, nine hundred fifty-eight thousand, eight hundred seventy-nine".