38899613 has 2 divisors, whose sum is σ = 38899614. Its totient is φ = 38899612.

The previous prime is 38899607. The next prime is 38899657. The reversal of 38899613 is 31699883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27857284 + 11042329 = 5278^2 + 3323^2 .

It is a cyclic number.

It is not a de Polignac number, because 38899613 - 2¹⁶ = 38834077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38899603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19449806 + 19449807.

It is an arithmetic number, because the mean of its divisors is an integer number (19449807).

Almost surely, 2^38899613 is an apocalyptic number.

It is an amenable number.

38899613 is a deficient number, since it is larger than the sum of its proper divisors (1).

38899613 is an equidigital number, since it uses as much as digits as its factorization.

38899613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 38899613 is about 6236.9554271295. The cubic root of 38899613 is about 338.8299254498.

It can be divided in two parts, 388 and 99613, that added together give a palindrome (100001).

The spelling of 38899613 in words is "thirty-eight million, eight hundred ninety-nine thousand, six hundred thirteen".