89951765 has 16 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 68964672.

The previous prime is 89951761. The next prime is 89951791. The reversal of 89951765 is 56715998.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 89951765 - 2² = 89951761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89951761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17924 + ... + 22386.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800).

Almost surely, 2^89951765 is an apocalyptic number.

It is an amenable number.

89951765 is a deficient number, since it is larger than the sum of its proper divisors (22541035).

89951765 is a wasteful number, since it uses less digits than its factorization.

89951765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636.

The product of its digits is 680400, while the sum is 50.

The square root of 89951765 is about 9484.2904320777. The cubic root of 89951765 is about 448.0604008831.

The spelling of 89951765 in words is "eighty-nine million, nine hundred fifty-one thousand, seven hundred sixty-five".