55869199 has 2 divisors, whose sum is σ = 55869200. Its totient is φ = 55869198.

The previous prime is 55869197. The next prime is 55869211. The reversal of 55869199 is 99196855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55869199 - 2¹ = 55869197 is a prime.

Together with 55869197, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55869193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27934599 + 27934600.

It is an arithmetic number, because the mean of its divisors is an integer number (27934600).

Almost surely, 2^55869199 is an apocalyptic number.

55869199 is a deficient number, since it is larger than the sum of its proper divisors (1).

55869199 is an equidigital number, since it uses as much as digits as its factorization.

55869199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 52.

The square root of 55869199 is about 7474.5701548651. The cubic root of 55869199 is about 382.2881313458.

The spelling of 55869199 in words is "fifty-five million, eight hundred sixty-nine thousand, one hundred ninety-nine".