139696786 has 12 divisors (see below), whose sum is σ = 221980878. Its totient is φ = 65707232.

The previous prime is 139696763. The next prime is 139696829. The reversal of 139696786 is 687696931.

It can be written as a sum of positive squares in only one way, i.e., 102718225 + 36978561 = 10135^2 + 6081^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67905 + ... + 69931.

Almost surely, 2^139696786 is an apocalyptic number.

139696786 is a deficient number, since it is larger than the sum of its proper divisors (82284092).

139696786 is an frugal number, since it uses more digits than its factorization.

139696786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073 (or 2046 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 55.

The square root of 139696786 is about 11819.3394908514. The cubic root of 139696786 is about 518.8742732989.

The spelling of 139696786 in words is "one hundred thirty-nine million, six hundred ninety-six thousand, seven hundred eighty-six".