86965661 has 4 divisors (see below), whose sum is σ = 87028032. Its totient is φ = 86903292.

The previous prime is 86965643. The next prime is 86965667. The reversal of 86965661 is 16656968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86965661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86965667) 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, 29045 + ... + 31898.

It is an arithmetic number, because the mean of its divisors is an integer number (21757008).

Almost surely, 2^86965661 is an apocalyptic number.

It is an amenable number.

86965661 is a deficient number, since it is larger than the sum of its proper divisors (62371).

86965661 is a wasteful number, since it uses less digits than its factorization.

86965661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62370.

The product of its digits is 466560, while the sum is 47.

The square root of 86965661 is about 9325.5381077984. The cubic root of 86965661 is about 443.0464565113.

The spelling of 86965661 in words is "eighty-six million, nine hundred sixty-five thousand, six hundred sixty-one".