987356765 has 32 divisors (see below), whose sum is σ = 1283973120. Its totient is φ = 726643456.

The previous prime is 987356761. The next prime is 987356791. The reversal of 987356765 is 567653789.

It is a cyclic number.

It is not a de Polignac number, because 987356765 - 2² = 987356761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987356765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987356761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1276919 + ... + 1277691.

It is an arithmetic number, because the mean of its divisors is an integer number (40124160).

Almost surely, 2^987356765 is an apocalyptic number.

It is an amenable number.

987356765 is a deficient number, since it is larger than the sum of its proper divisors (296616355).

987356765 is a wasteful number, since it uses less digits than its factorization.

987356765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213.

The product of its digits is 9525600, while the sum is 56.

The square root of 987356765 is about 31422.2336093410. The cubic root of 987356765 is about 995.7677012508.

The spelling of 987356765 in words is "nine hundred eighty-seven million, three hundred fifty-six thousand, seven hundred sixty-five".