38699657 has 2 divisors, whose sum is σ = 38699658. Its totient is φ = 38699656.

The previous prime is 38699629. The next prime is 38699671. The reversal of 38699657 is 75699683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31629376 + 7070281 = 5624^2 + 2659^2 .

It is an emirp because it is prime and its reverse (75699683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38699657 - 2¹⁶ = 38634121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38699599 and 38699608.

It is not a weakly prime, because it can be changed into another prime (38699357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19349828 + 19349829.

It is an arithmetic number, because the mean of its divisors is an integer number (19349829).

Almost surely, 2^38699657 is an apocalyptic number.

It is an amenable number.

38699657 is a deficient number, since it is larger than the sum of its proper divisors (1).

38699657 is an equidigital number, since it uses as much as digits as its factorization.

38699657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 38699657 is about 6220.9048377226. The cubic root of 38699657 is about 338.2483644253.

The spelling of 38699657 in words is "thirty-eight million, six hundred ninety-nine thousand, six hundred fifty-seven".