55770899 has 2 divisors, whose sum is σ = 55770900. Its totient is φ = 55770898.

The previous prime is 55770853. The next prime is 55770917. The reversal of 55770899 is 99807755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55770899 is a prime.

It is a super-2 number, since 2×55770899² = 6220786350536402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55770809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27885449 + 27885450.

It is an arithmetic number, because the mean of its divisors is an integer number (27885450).

Almost surely, 2^55770899 is an apocalyptic number.

55770899 is a deficient number, since it is larger than the sum of its proper divisors (1).

55770899 is an equidigital number, since it uses as much as digits as its factorization.

55770899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793800, while the sum is 50.

The square root of 55770899 is about 7467.9916309541. The cubic root of 55770899 is about 382.0637919652.

The spelling of 55770899 in words is "fifty-five million, seven hundred seventy thousand, eight hundred ninety-nine".