38589721 has 2 divisors, whose sum is σ = 38589722. Its totient is φ = 38589720.

The previous prime is 38589713. The next prime is 38589737. The reversal of 38589721 is 12798583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21483225 + 17106496 = 4635^2 + 4136^2 .

It is a cyclic number.

It is not a de Polignac number, because 38589721 - 2³ = 38589713 is a prime.

It is not a weakly prime, because it can be changed into another prime (38589751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19294860 + 19294861.

It is an arithmetic number, because the mean of its divisors is an integer number (19294861).

Almost surely, 2^38589721 is an apocalyptic number.

It is an amenable number.

38589721 is a deficient number, since it is larger than the sum of its proper divisors (1).

38589721 is an equidigital number, since it uses as much as digits as its factorization.

38589721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 38589721 is about 6212.0625399299. The cubic root of 38589721 is about 337.9277677889.

The spelling of 38589721 in words is "thirty-eight million, five hundred eighty-nine thousand, seven hundred twenty-one".