93290021 has 4 divisors (see below), whose sum is σ = 101770944. Its totient is φ = 84809100.

The previous prime is 93289997. The next prime is 93290023. The reversal of 93290021 is 12009239.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12009239 = 11 ⋅1091749.

It is a cyclic number.

It is not a de Polignac number, because 93290021 - 2⁶ = 93289957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93290023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4240445 + ... + 4240466.

It is an arithmetic number, because the mean of its divisors is an integer number (25442736).

Almost surely, 2^93290021 is an apocalyptic number.

It is an amenable number.

93290021 is a deficient number, since it is larger than the sum of its proper divisors (8480923).

93290021 is a wasteful number, since it uses less digits than its factorization.

93290021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480922.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 93290021 is about 9658.6759444553. The cubic root of 93290021 is about 453.5359632769.

The spelling of 93290021 in words is "ninety-three million, two hundred ninety thousand, twenty-one".