139073724 has 36 divisors (see below), whose sum is σ = 352486680. Its totient is φ = 46234080.

The previous prime is 139073723. The next prime is 139073731. The reversal of 139073724 is 427370931.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139073723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9039 + ... + 18969.

Almost surely, 2^139073724 is an apocalyptic number.

It is an amenable number.

139073724 is an abundant number, since it is smaller than the sum of its proper divisors (213412956).

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

139073724 is a wasteful number, since it uses less digits than its factorization.

139073724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10330 (or 10325 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 139073724 is about 11792.9523021167. The cubic root of 139073724 is about 518.1017127578.

The spelling of 139073724 in words is "one hundred thirty-nine million, seventy-three thousand, seven hundred twenty-four".