93070921 has 4 divisors (see below), whose sum is σ = 93334932. Its totient is φ = 92806912.

The previous prime is 93070843. The next prime is 93070931. The reversal of 93070921 is 12907039.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12907039 = 439 ⋅29401.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 71318025 = 4664^2 + 8445^2 .

It is a cyclic number.

It is not a de Polignac number, because 93070921 - 2²¹ = 90973769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93070931) 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 in 3 ways as a sum of consecutive naturals, for example, 131476 + ... + 132181.

It is an arithmetic number, because the mean of its divisors is an integer number (23333733).

Almost surely, 2^93070921 is an apocalyptic number.

It is an amenable number.

93070921 is a deficient number, since it is larger than the sum of its proper divisors (264011).

93070921 is a wasteful number, since it uses less digits than its factorization.

93070921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264010.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 93070921 is about 9647.3271427893. The cubic root of 93070921 is about 453.1806282937.

The spelling of 93070921 in words is "ninety-three million, seventy thousand, nine hundred twenty-one".