86697561 has 8 divisors (see below), whose sum is σ = 115647840. Its totient is φ = 57772832.

The previous prime is 86697547. The next prime is 86697571. The reversal of 86697561 is 16579668.

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

It is a cyclic number.

It is not a de Polignac number, because 86697561 - 2¹⁸ = 86435417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86697561.

It is not an unprimeable number, because it can be changed into a prime (86697521) 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, 3901 + ... + 13733.

It is an arithmetic number, because the mean of its divisors is an integer number (14455980).

Almost surely, 2^86697561 is an apocalyptic number.

It is an amenable number.

86697561 is a deficient number, since it is larger than the sum of its proper divisors (28950279).

86697561 is a wasteful number, since it uses less digits than its factorization.

86697561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12775.

The product of its digits is 544320, while the sum is 48.

The square root of 86697561 is about 9311.1525065375. The cubic root of 86697561 is about 442.5907094833.

The spelling of 86697561 in words is "eighty-six million, six hundred ninety-seven thousand, five hundred sixty-one".