93129221 has 4 divisors (see below), whose sum is σ = 93271200. Its totient is φ = 92987244.

The previous prime is 93129193. The next prime is 93129251. The reversal of 93129221 is 12292139.

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: 12292139 = 17 ⋅723067.

It is a cyclic number.

It is not a de Polignac number, because 93129221 - 2¹⁴ = 93112837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93129251) 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, 70001 + ... + 71318.

It is an arithmetic number, because the mean of its divisors is an integer number (23317800).

Almost surely, 2^93129221 is an apocalyptic number.

It is an amenable number.

93129221 is a deficient number, since it is larger than the sum of its proper divisors (141979).

93129221 is a wasteful number, since it uses less digits than its factorization.

93129221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141978.

The product of its digits is 1944, while the sum is 29.

The square root of 93129221 is about 9650.3482320588. The cubic root of 93129221 is about 453.2752332668.

The spelling of 93129221 in words is "ninety-three million, one hundred twenty-nine thousand, two hundred twenty-one".