654957987 has 16 divisors (see below), whose sum is σ = 948894720. Its totient is φ = 400312800.

The previous prime is 654957977. The next prime is 654957991. The reversal of 654957987 is 789759456.

It is not a de Polignac number, because 654957987 - 2¹⁸ = 654695843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654957987.

It is not an unprimeable number, because it can be changed into a prime (654957907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183564 + ... + 187097.

It is an arithmetic number, because the mean of its divisors is an integer number (59305920).

Almost surely, 2^654957987 is an apocalyptic number.

654957987 is a deficient number, since it is larger than the sum of its proper divisors (293936733).

654957987 is a wasteful number, since it uses less digits than its factorization.

654957987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370714.

The product of its digits is 19051200, while the sum is 60.

The square root of 654957987 is about 25592.1469791028. The cubic root of 654957987 is about 868.4359917417.

The spelling of 654957987 in words is "six hundred fifty-four million, nine hundred fifty-seven thousand, nine hundred eighty-seven".