55469387 has 2 divisors, whose sum is σ = 55469388. Its totient is φ = 55469386.

The previous prime is 55469383. The next prime is 55469423. The reversal of 55469387 is 78396455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55469387 - 2² = 55469383 is a prime.

It is not a weakly prime, because it can be changed into another prime (55469383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27734693 + 27734694.

It is an arithmetic number, because the mean of its divisors is an integer number (27734694).

Almost surely, 2^55469387 is an apocalyptic number.

55469387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55469387 is an equidigital number, since it uses as much as digits as its factorization.

55469387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 55469387 is about 7447.7773194424. Note that the first 3 decimals coincide. The cubic root of 55469387 is about 381.3740353565.

The spelling of 55469387 in words is "fifty-five million, four hundred sixty-nine thousand, three hundred eighty-seven".