129519074 has 4 divisors (see below), whose sum is σ = 194278614. Its totient is φ = 64759536.

The previous prime is 129519011. The next prime is 129519077. The reversal of 129519074 is 470915921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 120846049 + 8673025 = 10993^2 + 2945^2 .

It is not an unprimeable number, because it can be changed into a prime (129519077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32379767 + ... + 32379770.

Almost surely, 2^129519074 is an apocalyptic number.

129519074 is a deficient number, since it is larger than the sum of its proper divisors (64759540).

129519074 is an equidigital number, since it uses as much as digits as its factorization.

129519074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64759539.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 129519074 is about 11380.6447093300. The cubic root of 129519074 is about 505.9542444839.

The spelling of 129519074 in words is "one hundred twenty-nine million, five hundred nineteen thousand, seventy-four".