86633631 has 32 divisors (see below), whose sum is σ = 148518400. Its totient is φ = 49496184.

The previous prime is 86633629. The next prime is 86633633. The reversal of 86633631 is 13633668.

It is an interprime number because it is at equal distance from previous prime (86633629) and next prime (86633633).

It is not a de Polignac number, because 86633631 - 2¹ = 86633629 is a prime.

It is a super-2 number, since 2×86633631² = 15010772040488322, 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 (86633633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12480 + ... + 18138.

It is an arithmetic number, because the mean of its divisors is an integer number (4641200).

Almost surely, 2^86633631 is an apocalyptic number.

86633631 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

86633631 is a deficient number, since it is larger than the sum of its proper divisors (61884769).

86633631 is an frugal number, since it uses more digits than its factorization.

86633631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5687 (or 5669 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 86633631 is about 9307.7188934776. The cubic root of 86633631 is about 442.4818952662.

The spelling of 86633631 in words is "eighty-six million, six hundred thirty-three thousand, six hundred thirty-one".