655735987 has 2 divisors, whose sum is σ = 655735988. Its totient is φ = 655735986.

The previous prime is 655735943. The next prime is 655736017. The reversal of 655735987 is 789537556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655735987 - 2²⁷ = 521518259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (655735937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327867993 + 327867994.

It is an arithmetic number, because the mean of its divisors is an integer number (327867994).

Almost surely, 2^655735987 is an apocalyptic number.

655735987 is a deficient number, since it is larger than the sum of its proper divisors (1).

655735987 is an equidigital number, since it uses as much as digits as its factorization.

655735987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938000, while the sum is 55.

The square root of 655735987 is about 25607.3424431353. The cubic root of 655735987 is about 868.7797165137.

The spelling of 655735987 in words is "six hundred fifty-five million, seven hundred thirty-five thousand, nine hundred eighty-seven".