87476765 has 16 divisors (see below), whose sum is σ = 108183600. Its totient is φ = 67871232.

The previous prime is 87476717. The next prime is 87476773. The reversal of 87476765 is 56767478.

87476765 = 6613² + 6614².

It can be written as a sum of positive squares in 8 ways, for example, as 5139289 + 82337476 = 2267^2 + 9074^2 .

It is a cyclic number.

It is not a de Polignac number, because 87476765 - 2¹⁴ = 87460381 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21731 + ... + 25439.

It is an arithmetic number, because the mean of its divisors is an integer number (6761475).

Almost surely, 2^87476765 is an apocalyptic number.

87476765 is the 6614-th centered square number.

It is an amenable number.

87476765 is a deficient number, since it is larger than the sum of its proper divisors (20706835).

87476765 is a wasteful number, since it uses less digits than its factorization.

87476765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856.

The product of its digits is 1975680, while the sum is 50.

The square root of 87476765 is about 9352.9014214841. The cubic root of 87476765 is about 443.9127012983.

The spelling of 87476765 in words is "eighty-seven million, four hundred seventy-six thousand, seven hundred sixty-five".