392118421 has 8 divisors (see below), whose sum is σ = 409699584. Its totient is φ = 374581680.

The previous prime is 392118407. The next prime is 392118427. The reversal of 392118421 is 124811293.

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

It is not a de Polignac number, because 392118421 - 2⁹ = 392117909 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 (392118427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7636 + ... + 29026.

It is an arithmetic number, because the mean of its divisors is an integer number (51212448).

Almost surely, 2^392118421 is an apocalyptic number.

It is an amenable number.

392118421 is a deficient number, since it is larger than the sum of its proper divisors (17581163).

392118421 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 392118421 = (191382412)₁₁.

392118421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22211.

The product of its digits is 3456, while the sum is 31.

The square root of 392118421 is about 19801.9802292599. The cubic root of 392118421 is about 731.9348316326.

The spelling of 392118421 in words is "three hundred ninety-two million, one hundred eighteen thousand, four hundred twenty-one".