89957993 has 2 divisors, whose sum is σ = 89957994. Its totient is φ = 89957992.

The previous prime is 89957969. The next prime is 89958023. The reversal of 89957993 is 39975998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85969984 + 3988009 = 9272^2 + 1997^2 .

It is a cyclic number.

It is not a de Polignac number, because 89957993 - 2¹⁰ = 89956969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89957963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44978996 + 44978997.

It is an arithmetic number, because the mean of its divisors is an integer number (44978997).

Almost surely, 2^89957993 is an apocalyptic number.

It is an amenable number.

89957993 is a deficient number, since it is larger than the sum of its proper divisors (1).

89957993 is an equidigital number, since it uses as much as digits as its factorization.

89957993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 59.

The square root of 89957993 is about 9484.6187588116. The cubic root of 89957993 is about 448.0707414464.

The spelling of 89957993 in words is "eighty-nine million, nine hundred fifty-seven thousand, nine hundred ninety-three".