93405989 has 2 divisors, whose sum is σ = 93405990. Its totient is φ = 93405988.

The previous prime is 93405943. The next prime is 93405997. The reversal of 93405989 is 98950439.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91049764 + 2356225 = 9542^2 + 1535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-93405989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93405929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46702994 + 46702995.

It is an arithmetic number, because the mean of its divisors is an integer number (46702995).

Almost surely, 2^93405989 is an apocalyptic number.

It is an amenable number.

93405989 is a deficient number, since it is larger than the sum of its proper divisors (1).

93405989 is an equidigital number, since it uses as much as digits as its factorization.

93405989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 93405989 is about 9664.6773872696. The cubic root of 93405989 is about 453.7238143080.

The spelling of 93405989 in words is "ninety-three million, four hundred five thousand, nine hundred eighty-nine".