139568942 has 4 divisors (see below), whose sum is σ = 209353416. Its totient is φ = 69784470.

The previous prime is 139568917. The next prime is 139568953. The reversal of 139568942 is 249865931.

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

It is a congruent 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 as a sum of consecutive naturals, namely, 34892234 + ... + 34892237.

It is an arithmetic number, because the mean of its divisors is an integer number (52338354).

Almost surely, 2^139568942 is an apocalyptic number.

139568942 is a deficient number, since it is larger than the sum of its proper divisors (69784474).

139568942 is an equidigital number, since it uses as much as digits as its factorization.

139568942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69784473.

The product of its digits is 466560, while the sum is 47.

The square root of 139568942 is about 11813.9299980997. The cubic root of 139568942 is about 518.7159417907.

The spelling of 139568942 in words is "one hundred thirty-nine million, five hundred sixty-eight thousand, nine hundred forty-two".