55625987 has 2 divisors, whose sum is σ = 55625988. Its totient is φ = 55625986.

The previous prime is 55625981. The next prime is 55626007. The reversal of 55625987 is 78952655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55625987 - 2⁶ = 55625923 is a prime.

It is not a weakly prime, because it can be changed into another prime (55625981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27812993 + 27812994.

It is an arithmetic number, because the mean of its divisors is an integer number (27812994).

Almost surely, 2^55625987 is an apocalyptic number.

55625987 is a deficient number, since it is larger than the sum of its proper divisors (1).

55625987 is an equidigital number, since it uses as much as digits as its factorization.

55625987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 47.

The square root of 55625987 is about 7458.2831134250. The cubic root of 55625987 is about 381.7325938461.

The spelling of 55625987 in words is "fifty-five million, six hundred twenty-five thousand, nine hundred eighty-seven".