556799987 has 2 divisors, whose sum is σ = 556799988. Its totient is φ = 556799986.

The previous prime is 556799977. The next prime is 556799993. The reversal of 556799987 is 789997655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556799987 - 2⁶ = 556799923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (556799917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278399993 + 278399994.

It is an arithmetic number, because the mean of its divisors is an integer number (278399994).

Almost surely, 2^556799987 is an apocalyptic number.

556799987 is a deficient number, since it is larger than the sum of its proper divisors (1).

556799987 is an equidigital number, since it uses as much as digits as its factorization.

556799987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 65.

The square root of 556799987 is about 23596.6096505409. The cubic root of 556799987 is about 822.6840400798.

The spelling of 556799987 in words is "five hundred fifty-six million, seven hundred ninety-nine thousand, nine hundred eighty-seven".