89902993 has 2 divisors, whose sum is σ = 89902994. Its totient is φ = 89902992.

The previous prime is 89902991. The next prime is 89903017. The reversal of 89902993 is 39920998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88491649 + 1411344 = 9407^2 + 1188^2 .

It is a cyclic number.

It is not a de Polignac number, because 89902993 - 2¹ = 89902991 is a prime.

Together with 89902991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (89902991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44951496 + 44951497.

It is an arithmetic number, because the mean of its divisors is an integer number (44951497).

Almost surely, 2^89902993 is an apocalyptic number.

It is an amenable number.

89902993 is a deficient number, since it is larger than the sum of its proper divisors (1).

89902993 is an equidigital number, since it uses as much as digits as its factorization.

89902993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 89902993 is about 9481.7188842530. The cubic root of 89902993 is about 447.9794065390.

The spelling of 89902993 in words is "eighty-nine million, nine hundred two thousand, nine hundred ninety-three".