55899091 has 2 divisors, whose sum is σ = 55899092. Its totient is φ = 55899090.

The previous prime is 55899071. The next prime is 55899101. The reversal of 55899091 is 19099855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55899091 - 2⁵ = 55899059 is a prime.

It is not a weakly prime, because it can be changed into another prime (55899071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27949545 + 27949546.

It is an arithmetic number, because the mean of its divisors is an integer number (27949546).

Almost surely, 2^55899091 is an apocalyptic number.

55899091 is a deficient number, since it is larger than the sum of its proper divisors (1).

55899091 is an equidigital number, since it uses as much as digits as its factorization.

55899091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 55899091 is about 7476.5694673426. The cubic root of 55899091 is about 382.3562984195.

The spelling of 55899091 in words is "fifty-five million, eight hundred ninety-nine thousand, ninety-one".