129487090 has 24 divisors (see below), whose sum is σ = 245996460. Its totient is φ = 49067424.

The previous prime is 129487069. The next prime is 129487091. The reversal of 129487090 is 90784921.

It can be written as a sum of positive squares in 2 ways, for example, as 126090441 + 3396649 = 11229^2 + 1843^2 .

It is not an unprimeable number, because it can be changed into a prime (129487091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14325 + ... + 21544.

Almost surely, 2^129487090 is an apocalyptic number.

129487090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129487090 is a deficient number, since it is larger than the sum of its proper divisors (116509370).

129487090 is a wasteful number, since it uses less digits than its factorization.

129487090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35914 (or 35895 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 129487090 is about 11379.2394297686. The cubic root of 129487090 is about 505.9125935459.

The spelling of 129487090 in words is "one hundred twenty-nine million, four hundred eighty-seven thousand, ninety".