976513987 has 4 divisors (see below), whose sum is σ = 1027909480. Its totient is φ = 925118496.

The previous prime is 976513939. The next prime is 976513991. The reversal of 976513987 is 789315679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789315679 = 23 ⋅34318073.

It is a cyclic number.

It is not a de Polignac number, because 976513987 - 2⁷ = 976513859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (976513787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25697718 + ... + 25697755.

It is an arithmetic number, because the mean of its divisors is an integer number (256977370).

Almost surely, 2^976513987 is an apocalyptic number.

976513987 is a deficient number, since it is larger than the sum of its proper divisors (51395493).

976513987 is a wasteful number, since it uses less digits than its factorization.

976513987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51395492.

The product of its digits is 2857680, while the sum is 55.

The square root of 976513987 is about 31249.2237823598. The cubic root of 976513987 is about 992.1092284961.

The spelling of 976513987 in words is "nine hundred seventy-six million, five hundred thirteen thousand, nine hundred eighty-seven".