86419731 has 4 divisors (see below), whose sum is σ = 115226312. Its totient is φ = 57613152.

The previous prime is 86419703. The next prime is 86419757. The reversal of 86419731 is 13791468.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 86419731 - 2⁶ = 86419667 is a prime.

It is a super-2 number, since 2×86419731² = 14936739812224722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86419731.

It is not an unprimeable number, because it can be changed into a prime (86419331) 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, 14403286 + ... + 14403291.

It is an arithmetic number, because the mean of its divisors is an integer number (28806578).

Almost surely, 2^86419731 is an apocalyptic number.

86419731 is a deficient number, since it is larger than the sum of its proper divisors (28806581).

86419731 is a wasteful number, since it uses less digits than its factorization.

86419731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28806580.

The product of its digits is 36288, while the sum is 39.

The square root of 86419731 is about 9296.2213291208. The cubic root of 86419731 is about 442.1174298798.

The spelling of 86419731 in words is "eighty-six million, four hundred nineteen thousand, seven hundred thirty-one".