139321770 has 32 divisors (see below), whose sum is σ = 382140288. Its totient is φ = 31844928.

The previous prime is 139321769. The next prime is 139321801. The reversal of 139321770 is 77123931.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331509 + ... + 331928.

It is an arithmetic number, because the mean of its divisors is an integer number (11941884).

Almost surely, 2^139321770 is an apocalyptic number.

139321770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139321770 is an abundant number, since it is smaller than the sum of its proper divisors (242818518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139321770 is a wasteful number, since it uses less digits than its factorization.

139321770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663454.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 139321770 is about 11803.4643219692. The cubic root of 139321770 is about 518.4095512334.

The spelling of 139321770 in words is "one hundred thirty-nine million, three hundred twenty-one thousand, seven hundred seventy".