55605877 has 2 divisors, whose sum is σ = 55605878. Its totient is φ = 55605876.

The previous prime is 55605871. The next prime is 55605899. The reversal of 55605877 is 77850655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54257956 + 1347921 = 7366^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 55605877 - 2⁷ = 55605749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55605871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27802938 + 27802939.

It is an arithmetic number, because the mean of its divisors is an integer number (27802939).

Almost surely, 2^55605877 is an apocalyptic number.

It is an amenable number.

55605877 is a deficient number, since it is larger than the sum of its proper divisors (1).

55605877 is an equidigital number, since it uses as much as digits as its factorization.

55605877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294000, while the sum is 43.

The square root of 55605877 is about 7456.9348260529. The cubic root of 55605877 is about 381.6865867659.

The spelling of 55605877 in words is "fifty-five million, six hundred five thousand, eight hundred seventy-seven".