138902914 has 4 divisors (see below), whose sum is σ = 208354374. Its totient is φ = 69451456.

The previous prime is 138902899. The next prime is 138902963. The reversal of 138902914 is 419209831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 419209831 = 12157 ⋅34483.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 14691889 = 11145^2 + 3833^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34725727 + ... + 34725730.

Almost surely, 2^138902914 is an apocalyptic number.

138902914 is a deficient number, since it is larger than the sum of its proper divisors (69451460).

138902914 is an equidigital number, since it uses as much as digits as its factorization.

138902914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69451459.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 138902914 is about 11785.7080398252. The cubic root of 138902914 is about 517.8895154514.

The spelling of 138902914 in words is "one hundred thirty-eight million, nine hundred two thousand, nine hundred fourteen".