89640693 has 12 divisors (see below), whose sum is σ = 130161408. Its totient is φ = 59446440.

The previous prime is 89640679. The next prime is 89640731. The reversal of 89640693 is 39604698.

It is not a de Polignac number, because 89640693 - 2⁹ = 89640181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89640493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24355 + ... + 27792.

It is an arithmetic number, because the mean of its divisors is an integer number (10846784).

Almost surely, 2^89640693 is an apocalyptic number.

It is an amenable number.

89640693 is a deficient number, since it is larger than the sum of its proper divisors (40520715).

89640693 is a wasteful number, since it uses less digits than its factorization.

89640693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52344 (or 52341 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 89640693 is about 9467.8769003404. The cubic root of 89640693 is about 447.5433088553.

The spelling of 89640693 in words is "eighty-nine million, six hundred forty thousand, six hundred ninety-three".