38708521 has 2 divisors, whose sum is σ = 38708522. Its totient is φ = 38708520.

The previous prime is 38708459. The next prime is 38708539. The reversal of 38708521 is 12580783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33120025 + 5588496 = 5755^2 + 2364^2 .

It is an emirp because it is prime and its reverse (12580783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38708521 - 2⁷ = 38708393 is a prime.

It is not a weakly prime, because it can be changed into another prime (38708321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19354260 + 19354261.

It is an arithmetic number, because the mean of its divisors is an integer number (19354261).

Almost surely, 2^38708521 is an apocalyptic number.

It is an amenable number.

38708521 is a deficient number, since it is larger than the sum of its proper divisors (1).

38708521 is an equidigital number, since it uses as much as digits as its factorization.

38708521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 38708521 is about 6221.6172334852. The cubic root of 38708521 is about 338.2741872607.

The spelling of 38708521 in words is "thirty-eight million, seven hundred eight thousand, five hundred twenty-one".