138379699 has 2 divisors, whose sum is σ = 138379700. Its totient is φ = 138379698.

The previous prime is 138379697. The next prime is 138379729. The reversal of 138379699 is 996973831.

138379699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138379699 - 2¹ = 138379697 is a prime.

Together with 138379697, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (138379697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69189849 + 69189850.

It is an arithmetic number, because the mean of its divisors is an integer number (69189850).

Almost surely, 2^138379699 is an apocalyptic number.

138379699 is a deficient number, since it is larger than the sum of its proper divisors (1).

138379699 is an equidigital number, since it uses as much as digits as its factorization.

138379699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 55.

The square root of 138379699 is about 11763.4900858546. The cubic root of 138379699 is about 517.2384407961.

The spelling of 138379699 in words is "one hundred thirty-eight million, three hundred seventy-nine thousand, six hundred ninety-nine".