93940421 has 2 divisors, whose sum is σ = 93940422. Its totient is φ = 93940420.

The previous prime is 93940417. The next prime is 93940459. The reversal of 93940421 is 12404939.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72420100 + 21520321 = 8510^2 + 4639^2 .

It is a cyclic number.

It is not a de Polignac number, because 93940421 - 2² = 93940417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93940321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46970210 + 46970211.

It is an arithmetic number, because the mean of its divisors is an integer number (46970211).

Almost surely, 2^93940421 is an apocalyptic number.

It is an amenable number.

93940421 is a deficient number, since it is larger than the sum of its proper divisors (1).

93940421 is an equidigital number, since it uses as much as digits as its factorization.

93940421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 93940421 is about 9692.2866754961. The cubic root of 93940421 is about 454.5875116855.

The spelling of 93940421 in words is "ninety-three million, nine hundred forty thousand, four hundred twenty-one".