129749624 has 16 divisors (see below), whose sum is σ = 253858320. Its totient is φ = 62054080.

The previous prime is 129749621. The next prime is 129749687. The reversal of 129749624 is 426947921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129749621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352397 + ... + 352764.

It is an arithmetic number, because the mean of its divisors is an integer number (15866145).

Almost surely, 2^129749624 is an apocalyptic number.

It is an amenable number.

129749624 is a deficient number, since it is larger than the sum of its proper divisors (124108696).

129749624 is a wasteful number, since it uses less digits than its factorization.

129749624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705190 (or 705186 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 129749624 is about 11390.7692453144. The cubic root of 129749624 is about 506.2542739262.

The spelling of 129749624 in words is "one hundred twenty-nine million, seven hundred forty-nine thousand, six hundred twenty-four".