93490921 has 2 divisors, whose sum is σ = 93490922. Its totient is φ = 93490920.

The previous prime is 93490919. The next prime is 93490931. The reversal of 93490921 is 12909439.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71588521 + 21902400 = 8461^2 + 4680^2 .

It is a cyclic number.

It is not a de Polignac number, because 93490921 - 2¹ = 93490919 is a prime.

Together with 93490919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (93490931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46745460 + 46745461.

It is an arithmetic number, because the mean of its divisors is an integer number (46745461).

Almost surely, 2^93490921 is an apocalyptic number.

It is an amenable number.

93490921 is a deficient number, since it is larger than the sum of its proper divisors (1).

93490921 is an equidigital number, since it uses as much as digits as its factorization.

93490921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 93490921 is about 9669.0703275961. The cubic root of 93490921 is about 453.8612929908.

The spelling of 93490921 in words is "ninety-three million, four hundred ninety thousand, nine hundred twenty-one".