129960890 has 16 divisors (see below), whose sum is σ = 241996680. Its totient is φ = 50191680.

The previous prime is 129960889. The next prime is 129960899. The reversal of 129960890 is 98069921.

It can be written as a sum of positive squares in 4 ways, for example, as 106234249 + 23726641 = 10307^2 + 4871^2 .

It is not an unprimeable number, because it can be changed into a prime (129960899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223781 + ... + 224360.

Almost surely, 2^129960890 is an apocalyptic number.

129960890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129960890 is a deficient number, since it is larger than the sum of its proper divisors (112035790).

129960890 is a wasteful number, since it uses less digits than its factorization.

129960890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448177.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 129960890 is about 11400.0390350209. The cubic root of 129960890 is about 506.5288959632.

The spelling of 129960890 in words is "one hundred twenty-nine million, nine hundred sixty thousand, eight hundred ninety".