129849890 has 8 divisors (see below), whose sum is σ = 233729820. Its totient is φ = 51939952.

The previous prime is 129849887. The next prime is 129849899. The reversal of 129849890 is 98948921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 107391769 + 22458121 = 10363^2 + 4739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (129849899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6492485 + ... + 6492504.

Almost surely, 2^129849890 is an apocalyptic number.

129849890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129849890 is a deficient number, since it is larger than the sum of its proper divisors (103879930).

129849890 is a wasteful number, since it uses less digits than its factorization.

129849890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12984996.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 129849890 is about 11395.1695906643. The cubic root of 129849890 is about 506.3846455858.

The spelling of 129849890 in words is "one hundred twenty-nine million, eight hundred forty-nine thousand, eight hundred ninety".