138902899 has 2 divisors, whose sum is σ = 138902900. Its totient is φ = 138902898.

The previous prime is 138902893. The next prime is 138902963. The reversal of 138902899 is 998209831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138902899 - 2¹¹ = 138900851 is a prime.

It is not a weakly prime, because it can be changed into another prime (138902893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69451449 + 69451450.

It is an arithmetic number, because the mean of its divisors is an integer number (69451450).

Almost surely, 2^138902899 is an apocalyptic number.

138902899 is a deficient number, since it is larger than the sum of its proper divisors (1).

138902899 is an equidigital number, since it uses as much as digits as its factorization.

138902899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 138902899 is about 11785.7074034612. The cubic root of 138902899 is about 517.8894968092.

The spelling of 138902899 in words is "one hundred thirty-eight million, nine hundred two thousand, eight hundred ninety-nine".