89959999 has 4 divisors (see below), whose sum is σ = 92052136. Its totient is φ = 87867864.

The previous prime is 89959997. The next prime is 89960009. The reversal of 89959999 is 99995998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99995998 = 2 ⋅49997999.

It is a cyclic number.

It is not a de Polignac number, because 89959999 - 2¹ = 89959997 is a prime.

It is a Duffinian number.

89959999 is a modest number, since divided by 9999 gives 8995 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89959997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046004 + ... + 1046089.

It is an arithmetic number, because the mean of its divisors is an integer number (23013034).

Almost surely, 2^89959999 is an apocalyptic number.

89959999 is a deficient number, since it is larger than the sum of its proper divisors (2092137).

89959999 is a wasteful number, since it uses less digits than its factorization.

89959999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092136.

The product of its digits is 21257640, while the sum is 67.

The square root of 89959999 is about 9484.7245083872. The cubic root of 89959999 is about 448.0740719759.

The spelling of 89959999 in words is "eighty-nine million, nine hundred fifty-nine thousand, nine hundred ninety-nine".