86971761 has 12 divisors (see below), whose sum is σ = 128299392. Its totient is φ = 56747256.

The previous prime is 86971739. The next prime is 86971769. The reversal of 86971761 is 16717968.

It is not a de Polignac number, because 86971761 - 2⁶ = 86971697 is a prime.

It is a super-2 number, since 2×86971761² = 15128174422882242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86971769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102381 + ... + 103226.

It is an arithmetic number, because the mean of its divisors is an integer number (10691616).

Almost surely, 2^86971761 is an apocalyptic number.

It is an amenable number.

86971761 is a deficient number, since it is larger than the sum of its proper divisors (41327631).

86971761 is a wasteful number, since it uses less digits than its factorization.

86971761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205660 (or 205657 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 86971761 is about 9325.8651609382. The cubic root of 86971761 is about 443.0568150833.

The spelling of 86971761 in words is "eighty-six million, nine hundred seventy-one thousand, seven hundred sixty-one".