89999951 has 4 divisors (see below), whose sum is σ = 90027600. Its totient is φ = 89972304.

The previous prime is 89999911. The next prime is 89999969. The reversal of 89999951 is 15999998.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89999951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89999911) 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, 8171 + ... + 15708.

It is an arithmetic number, because the mean of its divisors is an integer number (22506900).

Almost surely, 2^89999951 is an apocalyptic number.

89999951 is a deficient number, since it is larger than the sum of its proper divisors (27649).

89999951 is a wasteful number, since it uses less digits than its factorization.

89999951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27648.

The product of its digits is 2361960, while the sum is 59.

The square root of 89999951 is about 9486.8303979780. The cubic root of 89999951 is about 448.1403933265.

The spelling of 89999951 in words is "eighty-nine million, nine hundred ninety-nine thousand, nine hundred fifty-one".