393025421 has 8 divisors (see below), whose sum is σ = 402276864. Its totient is φ = 383811120.

The previous prime is 393025387. The next prime is 393025489. The reversal of 393025421 is 124520393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393025421 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 (393025121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12731 + ... + 30791.

It is an arithmetic number, because the mean of its divisors is an integer number (50284608).

Almost surely, 2^393025421 is an apocalyptic number.

It is an amenable number.

393025421 is a deficient number, since it is larger than the sum of its proper divisors (9251443).

393025421 is a wasteful number, since it uses less digits than its factorization.

393025421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18571.

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

The square root of 393025421 is about 19824.8687511418. The cubic root of 393025421 is about 732.4987375486.

The spelling of 393025421 in words is "three hundred ninety-three million, twenty-five thousand, four hundred twenty-one".