89145919 has 2 divisors, whose sum is σ = 89145920. Its totient is φ = 89145918.

The previous prime is 89145877. The next prime is 89145937. The reversal of 89145919 is 91954198.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89145919 is a prime.

It is a super-2 number, since 2×89145919² = 15893989748709122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89145989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44572959 + 44572960.

It is an arithmetic number, because the mean of its divisors is an integer number (44572960).

Almost surely, 2^89145919 is an apocalyptic number.

89145919 is a deficient number, since it is larger than the sum of its proper divisors (1).

89145919 is an equidigital number, since it uses as much as digits as its factorization.

89145919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 46.

The square root of 89145919 is about 9441.7116562623. The cubic root of 89145919 is about 446.7183805004.

The spelling of 89145919 in words is "eighty-nine million, one hundred forty-five thousand, nine hundred nineteen".