94571989 has 2 divisors, whose sum is σ = 94571990. Its totient is φ = 94571988.

The previous prime is 94571959. The next prime is 94571999. The reversal of 94571989 is 98917549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80245764 + 14326225 = 8958^2 + 3785^2 .

It is a cyclic number.

It is not a de Polignac number, because 94571989 - 2⁷ = 94571861 is a prime.

It is a super-2 number, since 2×94571989² = 17887722206832242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (94571959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47285994 + 47285995.

It is an arithmetic number, because the mean of its divisors is an integer number (47285995).

Almost surely, 2^94571989 is an apocalyptic number.

It is an amenable number.

94571989 is a deficient number, since it is larger than the sum of its proper divisors (1).

94571989 is an equidigital number, since it uses as much as digits as its factorization.

94571989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 94571989 is about 9724.8130573292. The cubic root of 94571989 is about 455.6039783304.

The spelling of 94571989 in words is "ninety-four million, five hundred seventy-one thousand, nine hundred eighty-nine".