55861079 has 2 divisors, whose sum is σ = 55861080. Its totient is φ = 55861078.

The previous prime is 55861073. The next prime is 55861081. The reversal of 55861079 is 97016855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55861079 - 2⁴ = 55861063 is a prime.

Together with 55861081, 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 (55861073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27930539 + 27930540.

It is an arithmetic number, because the mean of its divisors is an integer number (27930540).

Almost surely, 2^55861079 is an apocalyptic number.

55861079 is a deficient number, since it is larger than the sum of its proper divisors (1).

55861079 is an equidigital number, since it uses as much as digits as its factorization.

55861079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 55861079 is about 7474.0269600798. The cubic root of 55861079 is about 382.2696099299.

The spelling of 55861079 in words is "fifty-five million, eight hundred sixty-one thousand, seventy-nine".