38538613 has 2 divisors, whose sum is σ = 38538614. Its totient is φ = 38538612.

The previous prime is 38538607. The next prime is 38538629. The reversal of 38538613 is 31683583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38217124 + 321489 = 6182^2 + 567^2 .

It is a cyclic number.

It is not a de Polignac number, because 38538613 - 2¹³ = 38530421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38538683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19269306 + 19269307.

It is an arithmetic number, because the mean of its divisors is an integer number (19269307).

Almost surely, 2^38538613 is an apocalyptic number.

It is an amenable number.

38538613 is a deficient number, since it is larger than the sum of its proper divisors (1).

38538613 is an equidigital number, since it uses as much as digits as its factorization.

38538613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 38538613 is about 6207.9475674332. The cubic root of 38538613 is about 337.7785186972.

The spelling of 38538613 in words is "thirty-eight million, five hundred thirty-eight thousand, six hundred thirteen".