89891069 has 2 divisors, whose sum is σ = 89891070. Its totient is φ = 89891068.

The previous prime is 89891059. The next prime is 89891083. The reversal of 89891069 is 96019898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56100100 + 33790969 = 7490^2 + 5813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89891069 is a prime.

It is a super-2 number, since 2×89891069² = 16160808571925522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89891029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44945534 + 44945535.

It is an arithmetic number, because the mean of its divisors is an integer number (44945535).

Almost surely, 2^89891069 is an apocalyptic number.

It is an amenable number.

89891069 is a deficient number, since it is larger than the sum of its proper divisors (1).

89891069 is an equidigital number, since it uses as much as digits as its factorization.

89891069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 89891069 is about 9481.0900744587. The cubic root of 89891069 is about 447.9596002180.

The spelling of 89891069 in words is "eighty-nine million, eight hundred ninety-one thousand, sixty-nine".