55677997 has 2 divisors, whose sum is σ = 55677998. Its totient is φ = 55677996.

The previous prime is 55677949. The next prime is 55678001. The reversal of 55677997 is 79977655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51753636 + 3924361 = 7194^2 + 1981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55677997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55677497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27838998 + 27838999.

It is an arithmetic number, because the mean of its divisors is an integer number (27838999).

Almost surely, 2^55677997 is an apocalyptic number.

It is an amenable number.

55677997 is a deficient number, since it is larger than the sum of its proper divisors (1).

55677997 is an equidigital number, since it uses as much as digits as its factorization.

55677997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4167450, while the sum is 55.

The square root of 55677997 is about 7461.7690261760. The cubic root of 55677997 is about 381.8515294295.

The spelling of 55677997 in words is "fifty-five million, six hundred seventy-seven thousand, nine hundred ninety-seven".