139999946 has 4 divisors (see below), whose sum is σ = 209999922. Its totient is φ = 69999972.

The previous prime is 139999931. The next prime is 139999957. The reversal of 139999946 is 649999931.

139999946 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 136632721 + 3367225 = 11689^2 + 1835^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34999985 + ... + 34999988.

Almost surely, 2^139999946 is an apocalyptic number.

139999946 is a deficient number, since it is larger than the sum of its proper divisors (69999976).

139999946 is an equidigital number, since it uses as much as digits as its factorization.

139999946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69999975.

The product of its digits is 4251528, while the sum is 59.

The square root of 139999946 is about 11832.1572842825. The cubic root of 139999946 is about 519.2493434245.

The spelling of 139999946 in words is "one hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred forty-six".