86473631 has 4 divisors (see below), whose sum is σ = 86499672. Its totient is φ = 86447592.

The previous prime is 86473609. The next prime is 86473649. The reversal of 86473631 is 13637468.

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

It is a cyclic number.

It is not a de Polignac number, because 86473631 - 2¹⁴ = 86457247 is a prime.

It is a super-2 number, since 2×86473631² = 14955377716648322, 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 (86473831) 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, 7160 + ... + 14973.

It is an arithmetic number, because the mean of its divisors is an integer number (21624918).

Almost surely, 2^86473631 is an apocalyptic number.

86473631 is a deficient number, since it is larger than the sum of its proper divisors (26041).

86473631 is a wasteful number, since it uses less digits than its factorization.

86473631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26040.

The product of its digits is 72576, while the sum is 38.

The square root of 86473631 is about 9299.1199045931. The cubic root of 86473631 is about 442.2093270142.

The spelling of 86473631 in words is "eighty-six million, four hundred seventy-three thousand, six hundred thirty-one".