392438165081 has 2 divisors, whose sum is σ = 392438165082. Its totient is φ = 392438165080.

The previous prime is 392438165069. The next prime is 392438165113. The reversal of 392438165081 is 180561834293.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339749094400 + 52689070681 = 582880^2 + 229541^2 .

It is a cyclic number.

It is not a de Polignac number, because 392438165081 - 2⁶ = 392438165017 is a prime.

It is a super-2 number, since 2×392438165081² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (392438165981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196219082540 + 196219082541.

It is an arithmetic number, because the mean of its divisors is an integer number (196219082541).

Almost surely, 2^392438165081 is an apocalyptic number.

It is an amenable number.

392438165081 is a deficient number, since it is larger than the sum of its proper divisors (1).

392438165081 is an equidigital number, since it uses as much as digits as its factorization.

392438165081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 392438165081 in words is "three hundred ninety-two billion, four hundred thirty-eight million, one hundred sixty-five thousand, eighty-one".