93043907921 has 2 divisors, whose sum is σ = 93043907922. Its totient is φ = 93043907920.

The previous prime is 93043907903. The next prime is 93043907927. The reversal of 93043907921 is 12970934039.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85637584321 + 7406323600 = 292639^2 + 86060^2 .

It is a cyclic number.

It is not a de Polignac number, because 93043907921 - 2²² = 93039713617 is a prime.

It is not a weakly prime, because it can be changed into another prime (93043907927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46521953960 + 46521953961.

It is an arithmetic number, because the mean of its divisors is an integer number (46521953961).

Almost surely, 2^93043907921 is an apocalyptic number.

It is an amenable number.

93043907921 is a deficient number, since it is larger than the sum of its proper divisors (1).

93043907921 is an equidigital number, since it uses as much as digits as its factorization.

93043907921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 47.

The spelling of 93043907921 in words is "ninety-three billion, forty-three million, nine hundred seven thousand, nine hundred twenty-one".