86761618 has 4 divisors (see below), whose sum is σ = 130142430. Its totient is φ = 43380808.

The previous prime is 86761613. The next prime is 86761637. The reversal of 86761618 is 81616768.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81595089 + 5166529 = 9033^2 + 2273^2 .

It is not an unprimeable number, because it can be changed into a prime (86761613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21690403 + ... + 21690406.

Almost surely, 2^86761618 is an apocalyptic number.

86761618 is a deficient number, since it is larger than the sum of its proper divisors (43380812).

86761618 is a wasteful number, since it uses less digits than its factorization.

86761618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43380811.

The product of its digits is 96768, while the sum is 43.

The square root of 86761618 is about 9314.5916711362. The cubic root of 86761618 is about 442.6996862264.

The spelling of 86761618 in words is "eighty-six million, seven hundred sixty-one thousand, six hundred eighteen".