392427537221 has 2 divisors, whose sum is σ = 392427537222. Its totient is φ = 392427537220.

The previous prime is 392427537163. The next prime is 392427537223. The reversal of 392427537221 is 122735724293.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256993233025 + 135434304196 = 506945^2 + 368014^2 .

It is a cyclic number.

It is not a de Polignac number, because 392427537221 - 2²² = 392423342917 is a prime.

Together with 392427537223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (392427537223) 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 as a sum of consecutive naturals, namely, 196213768610 + 196213768611.

It is an arithmetic number, because the mean of its divisors is an integer number (196213768611).

Almost surely, 2^392427537221 is an apocalyptic number.

It is an amenable number.

392427537221 is a deficient number, since it is larger than the sum of its proper divisors (1).

392427537221 is an equidigital number, since it uses as much as digits as its factorization.

392427537221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 47.

The spelling of 392427537221 in words is "three hundred ninety-two billion, four hundred twenty-seven million, five hundred thirty-seven thousand, two hundred twenty-one".