139605944 has 8 divisors (see below), whose sum is σ = 261761160. Its totient is φ = 69802968.

The previous prime is 139605931. The next prime is 139605953. The reversal of 139605944 is 449506931.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×139605944² = 38979639200262272, which contains 22 as substring.

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, 8725364 + ... + 8725379.

It is an arithmetic number, because the mean of its divisors is an integer number (32720145).

Almost surely, 2^139605944 is an apocalyptic number.

It is an amenable number.

139605944 is a deficient number, since it is larger than the sum of its proper divisors (122155216).

139605944 is a wasteful number, since it uses less digits than its factorization.

139605944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17450749 (or 17450745 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 139605944 is about 11815.4959269596. The cubic root of 139605944 is about 518.7617777555.

The spelling of 139605944 in words is "one hundred thirty-nine million, six hundred five thousand, nine hundred forty-four".