38797909 has 2 divisors, whose sum is σ = 38797910. Its totient is φ = 38797908.

The previous prime is 38797907. The next prime is 38797919. The reversal of 38797909 is 90979783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31080625 + 7717284 = 5575^2 + 2778^2 .

It is an emirp because it is prime and its reverse (90979783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38797909 - 2¹ = 38797907 is a prime.

Together with 38797907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38797901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19398954 + 19398955.

It is an arithmetic number, because the mean of its divisors is an integer number (19398955).

Almost surely, 2^38797909 is an apocalyptic number.

It is an amenable number.

38797909 is a deficient number, since it is larger than the sum of its proper divisors (1).

38797909 is an equidigital number, since it uses as much as digits as its factorization.

38797909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 38797909 is about 6228.7967537880. The cubic root of 38797909 is about 338.5343746523.

The spelling of 38797909 in words is "thirty-eight million, seven hundred ninety-seven thousand, nine hundred nine".