129530349 has 24 divisors (see below), whose sum is σ = 202987512. Its totient is φ = 79119360.

The previous prime is 129530339. The next prime is 129530371. The reversal of 129530349 is 943035921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3305124 + 126225225 = 1818^2 + 11235^2 .

It is not a de Polignac number, because 129530349 - 2⁹ = 129529837 is a prime.

It is a super-2 number, since 2×129530349² = 33556222624123602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129530329) 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, 11989 + ... + 20069.

It is an arithmetic number, because the mean of its divisors is an integer number (8457813).

Almost surely, 2^129530349 is an apocalyptic number.

It is an amenable number.

129530349 is a deficient number, since it is larger than the sum of its proper divisors (73457163).

129530349 is a wasteful number, since it uses less digits than its factorization.

129530349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8237 (or 8234 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 129530349 is about 11381.1400571296. The cubic root of 129530349 is about 505.9689256384.

The spelling of 129530349 in words is "one hundred twenty-nine million, five hundred thirty thousand, three hundred forty-nine".