93440989 has 2 divisors, whose sum is σ = 93440990. Its totient is φ = 93440988.

The previous prime is 93440981. The next prime is 93440999. The reversal of 93440989 is 98904439.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93276964 + 164025 = 9658^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 93440989 - 2³ = 93440981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93440981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46720494 + 46720495.

It is an arithmetic number, because the mean of its divisors is an integer number (46720495).

Almost surely, 2^93440989 is an apocalyptic number.

It is an amenable number.

93440989 is a deficient number, since it is larger than the sum of its proper divisors (1).

93440989 is an equidigital number, since it uses as much as digits as its factorization.

93440989 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 46.

The square root of 93440989 is about 9666.4879351293. The cubic root of 93440989 is about 453.7804785918.

The spelling of 93440989 in words is "ninety-three million, four hundred forty thousand, nine hundred eighty-nine".