88689631 has 2 divisors, whose sum is σ = 88689632. Its totient is φ = 88689630.

The previous prime is 88689613. The next prime is 88689637. The reversal of 88689631 is 13698688.

Together with previous prime (88689613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 88689631 - 2¹¹ = 88687583 is a prime.

It is a super-2 number, since 2×88689631² = 15731701293832322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88689637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44344815 + 44344816.

It is an arithmetic number, because the mean of its divisors is an integer number (44344816).

Almost surely, 2^88689631 is an apocalyptic number.

88689631 is a deficient number, since it is larger than the sum of its proper divisors (1).

88689631 is an equidigital number, since it uses as much as digits as its factorization.

88689631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 49.

The square root of 88689631 is about 9417.5172418212. The cubic root of 88689631 is about 445.9549094085.

The spelling of 88689631 in words is "eighty-eight million, six hundred eighty-nine thousand, six hundred thirty-one".