38158649 has 2 divisors, whose sum is σ = 38158650. Its totient is φ = 38158648.

The previous prime is 38158639. The next prime is 38158651. The reversal of 38158649 is 94685183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37908649 + 250000 = 6157^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 38158649 - 2²⁴ = 21381433 is a prime.

Together with 38158651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38158619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19079324 + 19079325.

It is an arithmetic number, because the mean of its divisors is an integer number (19079325).

Almost surely, 2^38158649 is an apocalyptic number.

It is an amenable number.

38158649 is a deficient number, since it is larger than the sum of its proper divisors (1).

38158649 is an equidigital number, since it uses as much as digits as its factorization.

38158649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 38158649 is about 6177.2687330243. The cubic root of 38158649 is about 336.6647630299.

The spelling of 38158649 in words is "thirty-eight million, one hundred fifty-eight thousand, six hundred forty-nine".