55477867 has 2 divisors, whose sum is σ = 55477868. Its totient is φ = 55477866.

The previous prime is 55477861. The next prime is 55477871. The reversal of 55477867 is 76877455.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55477867 - 2³ = 55477859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55477867.

It is not a weakly prime, because it can be changed into another prime (55477861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27738933 + 27738934.

It is an arithmetic number, because the mean of its divisors is an integer number (27738934).

Almost surely, 2^55477867 is an apocalyptic number.

55477867 is a deficient number, since it is larger than the sum of its proper divisors (1).

55477867 is an equidigital number, since it uses as much as digits as its factorization.

55477867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1646400, while the sum is 49.

The square root of 55477867 is about 7448.3465950505. The cubic root of 55477867 is about 381.3934688207.

The spelling of 55477867 in words is "fifty-five million, four hundred seventy-seven thousand, eight hundred sixty-seven".