89742013 has 2 divisors, whose sum is σ = 89742014. Its totient is φ = 89742012.

The previous prime is 89741969. The next prime is 89742017. The reversal of 89742013 is 31024798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52446564 + 37295449 = 7242^2 + 6107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89742013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89742013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89742017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44871006 + 44871007.

It is an arithmetic number, because the mean of its divisors is an integer number (44871007).

Almost surely, 2^89742013 is an apocalyptic number.

It is an amenable number.

89742013 is a deficient number, since it is larger than the sum of its proper divisors (1).

89742013 is an equidigital number, since it uses as much as digits as its factorization.

89742013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 89742013 is about 9473.2261136320. The cubic root of 89742013 is about 447.7118633101.

The spelling of 89742013 in words is "eighty-nine million, seven hundred forty-two thousand, thirteen".