129519650 has 24 divisors (see below), whose sum is σ = 259439124. Its totient is φ = 47822400.

The previous prime is 129519623. The next prime is 129519659. The reversal of 129519650 is 56915921.

It can be written as a sum of positive squares in 6 ways, for example, as 946729 + 128572921 = 973^2 + 11339^2 .

It is a super-2 number, since 2×129519650² = 33550679472245000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129519659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98981 + ... + 100280.

Almost surely, 2^129519650 is an apocalyptic number.

129519650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129519650 is an abundant number, since it is smaller than the sum of its proper divisors (129919474).

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

129519650 is a wasteful number, since it uses less digits than its factorization.

129519650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199286 (or 199281 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 38.

The square root of 129519650 is about 11380.6700154253. The cubic root of 129519650 is about 505.9549945130.

The spelling of 129519650 in words is "one hundred twenty-nine million, five hundred nineteen thousand, six hundred fifty".