90689641 has 24 divisors (see below), whose sum is σ = 114912000. Its totient is φ = 71082144.

The previous prime is 90689639. The next prime is 90689657. The reversal of 90689641 is 14698609.

It is not a de Polignac number, because 90689641 - 2¹ = 90689639 is a prime.

It is a super-2 number, since 2×90689641² = 16449221969417762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90689671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25320 + ... + 28678.

It is an arithmetic number, because the mean of its divisors is an integer number (4788000).

Almost surely, 2^90689641 is an apocalyptic number.

It is an amenable number.

90689641 is a deficient number, since it is larger than the sum of its proper divisors (24222359).

90689641 is a wasteful number, since it uses less digits than its factorization.

90689641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421 (or 3414 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 90689641 is about 9523.1108887800. The cubic root of 90689641 is about 449.2822153578.

The spelling of 90689641 in words is "ninety million, six hundred eighty-nine thousand, six hundred forty-one".