139423756 has 6 divisors (see below), whose sum is σ = 243991580. Its totient is φ = 69711876.

The previous prime is 139423747. The next prime is 139423763. The reversal of 139423756 is 657324931.

It is a happy number.

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 as a sum of consecutive naturals, namely, 17427966 + ... + 17427973.

Almost surely, 2^139423756 is an apocalyptic number.

It is an amenable number.

139423756 is a deficient number, since it is larger than the sum of its proper divisors (104567824).

139423756 is a wasteful number, since it uses less digits than its factorization.

139423756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34855943 (or 34855941 counting only the distinct ones).

The product of its digits is 136080, while the sum is 40.

The square root of 139423756 is about 11807.7837039810. The cubic root of 139423756 is about 518.5360153675.

The spelling of 139423756 in words is "one hundred thirty-nine million, four hundred twenty-three thousand, seven hundred fifty-six".