138697426 has 16 divisors (see below), whose sum is σ = 239345280. Its totient is φ = 59047200.

The previous prime is 138697417. The next prime is 138697453. The reversal of 138697426 is 624796831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30691 + ... + 34918.

It is an arithmetic number, because the mean of its divisors is an integer number (14959080).

Almost surely, 2^138697426 is an apocalyptic number.

138697426 is a deficient number, since it is larger than the sum of its proper divisors (100647854).

138697426 is a wasteful number, since it uses less digits than its factorization.

138697426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65769.

The product of its digits is 435456, while the sum is 46.

The square root of 138697426 is about 11776.9871359359. The cubic root of 138697426 is about 517.6340070082.

The spelling of 138697426 in words is "one hundred thirty-eight million, six hundred ninety-seven thousand, four hundred twenty-six".