55927987 has 2 divisors, whose sum is σ = 55927988. Its totient is φ = 55927986.

The previous prime is 55927957. The next prime is 55928003. The reversal of 55927987 is 78972955.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55927987 is a prime.

It is not a weakly prime, because it can be changed into another prime (55927957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27963993 + 27963994.

It is an arithmetic number, because the mean of its divisors is an integer number (27963994).

Almost surely, 2^55927987 is an apocalyptic number.

55927987 is a deficient number, since it is larger than the sum of its proper divisors (1).

55927987 is an equidigital number, since it uses as much as digits as its factorization.

55927987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 52.

The square root of 55927987 is about 7478.5016547434. The cubic root of 55927987 is about 382.4221710731.

The spelling of 55927987 in words is "fifty-five million, nine hundred twenty-seven thousand, nine hundred eighty-seven".