55090907 has 2 divisors, whose sum is σ = 55090908. Its totient is φ = 55090906.

The previous prime is 55090879. The next prime is 55090927. The reversal of 55090907 is 70909055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55090907 - 2²² = 50896603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55090927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27545453 + 27545454.

It is an arithmetic number, because the mean of its divisors is an integer number (27545454).

Almost surely, 2^55090907 is an apocalyptic number.

55090907 is a deficient number, since it is larger than the sum of its proper divisors (1).

55090907 is an equidigital number, since it uses as much as digits as its factorization.

55090907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14175, while the sum is 35.

The square root of 55090907 is about 7422.3249053110. The cubic root of 55090907 is about 380.5046549864.

The spelling of 55090907 in words is "fifty-five million, ninety thousand, nine hundred seven".