653513987 has 8 divisors (see below), whose sum is σ = 786182400. Its totient is φ = 530672904.

The previous prime is 653513981. The next prime is 653513999. The reversal of 653513987 is 789315356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653513987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653513981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2456687 + ... + 2456952.

It is an arithmetic number, because the mean of its divisors is an integer number (98272800).

Almost surely, 2^653513987 is an apocalyptic number.

653513987 is a deficient number, since it is larger than the sum of its proper divisors (132668413).

653513987 is a wasteful number, since it uses less digits than its factorization.

653513987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913665.

The product of its digits is 680400, while the sum is 47.

The square root of 653513987 is about 25563.9196329514. The cubic root of 653513987 is about 867.7973022802.

The spelling of 653513987 in words is "six hundred fifty-three million, five hundred thirteen thousand, nine hundred eighty-seven".