139657750 has 32 divisors (see below), whose sum is σ = 264075552. Its totient is φ = 55300000.

The previous prime is 139657747. The next prime is 139657789. The reversal of 139657750 is 57756931.

It is a junction number, because it is equal to n+sod(n) for n = 139657697 and 139657706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22485 + ... + 28015.

It is an arithmetic number, because the mean of its divisors is an integer number (8252361).

Almost surely, 2^139657750 is an apocalyptic number.

139657750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139657750 is a deficient number, since it is larger than the sum of its proper divisors (124417802).

139657750 is a wasteful number, since it uses less digits than its factorization.

139657750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5649 (or 5639 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 43.

The square root of 139657750 is about 11817.6880141591. The cubic root of 139657750 is about 518.8259384645.

The spelling of 139657750 in words is "one hundred thirty-nine million, six hundred fifty-seven thousand, seven hundred fifty".