86911431 has 8 divisors (see below), whose sum is σ = 118708464. Its totient is φ = 56527680.

The previous prime is 86911427. The next prime is 86911493. The reversal of 86911431 is 13411968.

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

It is not a de Polignac number, because 86911431 - 2² = 86911427 is a prime.

It is a super-2 number, since 2×86911431² = 15107193676935522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86911392 and 86911401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86911421) 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, 353176 + ... + 353421.

It is an arithmetic number, because the mean of its divisors is an integer number (14838558).

Almost surely, 2^86911431 is an apocalyptic number.

86911431 is a deficient number, since it is larger than the sum of its proper divisors (31797033).

86911431 is a wasteful number, since it uses less digits than its factorization.

86911431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706641.

The product of its digits is 5184, while the sum is 33.

The square root of 86911431 is about 9322.6300473632. The cubic root of 86911431 is about 442.9543458057.

The spelling of 86911431 in words is "eighty-six million, nine hundred eleven thousand, four hundred thirty-one".