38154139 has 2 divisors, whose sum is σ = 38154140. Its totient is φ = 38154138.

The previous prime is 38154133. The next prime is 38154157. The reversal of 38154139 is 93145183.

It is a weak prime.

It is an emirp because it is prime and its reverse (93145183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38154139 - 2¹¹ = 38152091 is a prime.

It is not a weakly prime, because it can be changed into another prime (38154133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19077069 + 19077070.

It is an arithmetic number, because the mean of its divisors is an integer number (19077070).

Almost surely, 2^38154139 is an apocalyptic number.

38154139 is a deficient number, since it is larger than the sum of its proper divisors (1).

38154139 is an equidigital number, since it uses as much as digits as its factorization.

38154139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 38154139 is about 6176.9036741720. The cubic root of 38154139 is about 336.6514989518.

The spelling of 38154139 in words is "thirty-eight million, one hundred fifty-four thousand, one hundred thirty-nine".