86971901 has 4 divisors (see below), whose sum is σ = 90753312. Its totient is φ = 83190492.

The previous prime is 86971897. The next prime is 86971903. The reversal of 86971901 is 10917968.

It is a happy number.

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 not a de Polignac number, because 86971901 - 2² = 86971897 is a prime.

It is a super-2 number, since 2×86971901² = 15128223127107602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86971903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1890671 + ... + 1890716.

It is an arithmetic number, because the mean of its divisors is an integer number (22688328).

Almost surely, 2^86971901 is an apocalyptic number.

It is an amenable number.

86971901 is a deficient number, since it is larger than the sum of its proper divisors (3781411).

86971901 is a wasteful number, since it uses less digits than its factorization.

86971901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3781410.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 86971901 is about 9325.8726669411. The cubic root of 86971901 is about 443.0570528154.

The spelling of 86971901 in words is "eighty-six million, nine hundred seventy-one thousand, nine hundred one".