139894974 has 12 divisors (see below), whose sum is σ = 303105816. Its totient is φ = 46631652.

The previous prime is 139894973. The next prime is 139894991. The reversal of 139894974 is 479498931.

It is a self number, because there is not a number n which added to its sum of digits gives 139894974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139894973) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3885954 + ... + 3885989.

It is an arithmetic number, because the mean of its divisors is an integer number (25258818).

Almost surely, 2^139894974 is an apocalyptic number.

139894974 is an abundant number, since it is smaller than the sum of its proper divisors (163210842).

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

139894974 is a wasteful number, since it uses less digits than its factorization.

139894974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771951 (or 7771948 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 139894974 is about 11827.7205749882. The cubic root of 139894974 is about 519.1195332059.

The spelling of 139894974 in words is "one hundred thirty-nine million, eight hundred ninety-four thousand, nine hundred seventy-four".