139891894 has 16 divisors (see below), whose sum is σ = 215864928. Its totient is φ = 67943232.

The previous prime is 139891879. The next prime is 139891903. The reversal of 139891894 is 498198931.

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 in 7 ways as a sum of consecutive naturals, for example, 59754 + ... + 62050.

It is an arithmetic number, because the mean of its divisors is an integer number (13491558).

Almost surely, 2^139891894 is an apocalyptic number.

139891894 is a deficient number, since it is larger than the sum of its proper divisors (75973034).

139891894 is a wasteful number, since it uses less digits than its factorization.

139891894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159.

The product of its digits is 559872, while the sum is 52.

The square root of 139891894 is about 11827.5903716691. The cubic root of 139891894 is about 519.1157234433.

The spelling of 139891894 in words is "one hundred thirty-nine million, eight hundred ninety-one thousand, eight hundred ninety-four".