129989754 has 48 divisors (see below), whose sum is σ = 297554400. Its totient is φ = 40899168.

The previous prime is 129989753. The next prime is 129989759. The reversal of 129989754 is 457989921.

It is a super-2 number, since 2×129989754² = 33794672289961032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129989754.

It is not an unprimeable number, because it can be changed into a prime (129989753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127057 + ... + 128075.

It is an arithmetic number, because the mean of its divisors is an integer number (6199050).

Almost surely, 2^129989754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129989754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148777200).

129989754 is an abundant number, since it is smaller than the sum of its proper divisors (167564646).

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

129989754 is a wasteful number, since it uses less digits than its factorization.

129989754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419 (or 1416 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 129989754 is about 11401.3049253145. The cubic root of 129989754 is about 506.5663928024.

The spelling of 129989754 in words is "one hundred twenty-nine million, nine hundred eighty-nine thousand, seven hundred fifty-four".