88643631 has 4 divisors (see below), whose sum is σ = 118191512. Its totient is φ = 59095752.

The previous prime is 88643629. The next prime is 88643657. The reversal of 88643631 is 13634688.

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

It is not a de Polignac number, because 88643631 - 2¹ = 88643629 is a prime.

It is a super-2 number, since 2×88643631² = 15715386633728322, 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 88643631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88643671) 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, 14773936 + ... + 14773941.

It is an arithmetic number, because the mean of its divisors is an integer number (29547878).

Almost surely, 2^88643631 is an apocalyptic number.

88643631 is a deficient number, since it is larger than the sum of its proper divisors (29547881).

88643631 is a wasteful number, since it uses less digits than its factorization.

88643631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29547880.

The product of its digits is 82944, while the sum is 39.

The square root of 88643631 is about 9415.0746677868. The cubic root of 88643631 is about 445.8777960217.

The spelling of 88643631 in words is "eighty-eight million, six hundred forty-three thousand, six hundred thirty-one".