139977493 has 16 divisors (see below), whose sum is σ = 148879360. Its totient is φ = 131414400.

The previous prime is 139977491. The next prime is 139977521. The reversal of 139977493 is 394779931.

It is a happy number.

139977493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 139977493 - 2¹ = 139977491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139977493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139977491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148921 + ... + 149857.

It is an arithmetic number, because the mean of its divisors is an integer number (9304960).

Almost surely, 2^139977493 is an apocalyptic number.

It is an amenable number.

139977493 is a deficient number, since it is larger than the sum of its proper divisors (8901867).

139977493 is an equidigital number, since it uses as much as digits as its factorization.

139977493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108.

The product of its digits is 1285956, while the sum is 52.

The square root of 139977493 is about 11831.2084336301. The cubic root of 139977493 is about 519.2215831070.

The spelling of 139977493 in words is "one hundred thirty-nine million, nine hundred seventy-seven thousand, four hundred ninety-three".