129719690 has 32 divisors (see below), whose sum is σ = 247872960. Its totient is φ = 48708864.

The previous prime is 129719677. The next prime is 129719699. The reversal of 129719690 is 96917921.

It is a super-2 number, since 2×129719690² = 33654395947392200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (129719699) 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 15 ways as a sum of consecutive naturals, for example, 88181 + ... + 89639.

It is an arithmetic number, because the mean of its divisors is an integer number (7746030).

Almost surely, 2^129719690 is an apocalyptic number.

129719690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129719690 is a deficient number, since it is larger than the sum of its proper divisors (118153270).

129719690 is a wasteful number, since it uses less digits than its factorization.

129719690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006.

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 129719690 is about 11389.4552108518. The cubic root of 129719690 is about 506.2153389875.

The spelling of 129719690 in words is "one hundred twenty-nine million, seven hundred nineteen thousand, six hundred ninety".