38161997 has 2 divisors, whose sum is σ = 38161998. Its totient is φ = 38161996.

The previous prime is 38161987. The next prime is 38162009. The reversal of 38161997 is 79916183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32844361 + 5317636 = 5731^2 + 2306^2 .

It is an emirp because it is prime and its reverse (79916183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38161997 - 2⁶ = 38161933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38161987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19080998 + 19080999.

It is an arithmetic number, because the mean of its divisors is an integer number (19080999).

Almost surely, 2^38161997 is an apocalyptic number.

It is an amenable number.

38161997 is a deficient number, since it is larger than the sum of its proper divisors (1).

38161997 is an equidigital number, since it uses as much as digits as its factorization.

38161997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 38161997 is about 6177.5397206331. The cubic root of 38161997 is about 336.6746089468.

The spelling of 38161997 in words is "thirty-eight million, one hundred sixty-one thousand, nine hundred ninety-seven".