392427537217 has 4 divisors (see below), whose sum is σ = 392555742676. Its totient is φ = 392299331760.

The previous prime is 392427537163. The next prime is 392427537221. The reversal of 392427537217 is 712735724293.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 379368533041 + 13059004176 = 615929^2 + 114276^2 .

It is a cyclic number.

It is not a de Polignac number, because 392427537217 - 2¹⁵ = 392427504449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (392427537517) 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, 64098138 + ... + 64104259.

It is an arithmetic number, because the mean of its divisors is an integer number (98138935669).

Almost surely, 2^392427537217 is an apocalyptic number.

It is an amenable number.

392427537217 is a deficient number, since it is larger than the sum of its proper divisors (128205459).

392427537217 is a wasteful number, since it uses less digits than its factorization.

392427537217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128205458.

The product of its digits is 4445280, while the sum is 52.

The spelling of 392427537217 in words is "three hundred ninety-two billion, four hundred twenty-seven million, five hundred thirty-seven thousand, two hundred seventeen".