393250421 has 4 divisors (see below), whose sum is σ = 393306144. Its totient is φ = 393194700.

The previous prime is 393250397. The next prime is 393250453. The reversal of 393250421 is 124052393.

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.

It is a cyclic number.

It is not a de Polignac number, because 393250421 - 2²² = 389056117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393250471) 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, 15425 + ... + 32006.

It is an arithmetic number, because the mean of its divisors is an integer number (98326536).

Almost surely, 2^393250421 is an apocalyptic number.

It is an amenable number.

393250421 is a deficient number, since it is larger than the sum of its proper divisors (55723).

393250421 is an equidigital number, since it uses as much as digits as its factorization.

393250421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55722.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 393250421 is about 19830.5426299938. The cubic root of 393250421 is about 732.6384916769.

The spelling of 393250421 in words is "three hundred ninety-three million, two hundred fifty thousand, four hundred twenty-one".