129951890 has 8 divisors (see below), whose sum is σ = 233913420. Its totient is φ = 51980752.

The previous prime is 129951889. The next prime is 129951911. The reversal of 129951890 is 98159921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 114982729 + 14969161 = 10723^2 + 3869^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6497585 + ... + 6497604.

Almost surely, 2^129951890 is an apocalyptic number.

129951890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129951890 is a deficient number, since it is larger than the sum of its proper divisors (103961530).

129951890 is a wasteful number, since it uses less digits than its factorization.

129951890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12995196.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 129951890 is about 11399.6442926962. The cubic root of 129951890 is about 506.5172030472.

The spelling of 129951890 in words is "one hundred twenty-nine million, nine hundred fifty-one thousand, eight hundred ninety".