38699917 has 2 divisors, whose sum is σ = 38699918. Its totient is φ = 38699916.

The previous prime is 38699887. The next prime is 38699923. The reversal of 38699917 is 71999683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37711881 + 988036 = 6141^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 38699917 - 2¹⁵ = 38667149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38699987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19349958 + 19349959.

It is an arithmetic number, because the mean of its divisors is an integer number (19349959).

Almost surely, 2^38699917 is an apocalyptic number.

It is an amenable number.

38699917 is a deficient number, since it is larger than the sum of its proper divisors (1).

38699917 is an equidigital number, since it uses as much as digits as its factorization.

38699917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The square root of 38699917 is about 6220.9257349690. The cubic root of 38699917 is about 338.2491219202.

The spelling of 38699917 in words is "thirty-eight million, six hundred ninety-nine thousand, nine hundred seventeen".