129189476 has 24 divisors (see below), whose sum is σ = 244378680. Its totient is φ = 59404032.

The previous prime is 129189457. The next prime is 129189481. The reversal of 129189476 is 674981921.

It can be written as a sum of positive squares in 4 ways, for example, as 139876 + 129049600 = 374^2 + 11360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 129189476.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9920 + ... + 18888.

It is an arithmetic number, because the mean of its divisors is an integer number (10182445).

Almost surely, 2^129189476 is an apocalyptic number.

It is an amenable number.

129189476 is a deficient number, since it is larger than the sum of its proper divisors (115189204).

129189476 is a wasteful number, since it uses less digits than its factorization.

129189476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9263 (or 9261 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 129189476 is about 11366.1548467369. The cubic root of 129189476 is about 505.5246985760.

The spelling of 129189476 in words is "one hundred twenty-nine million, one hundred eighty-nine thousand, four hundred seventy-six".