129773898 has 24 divisors (see below), whose sum is σ = 290873700. Its totient is φ = 41766144.

The previous prime is 129773879. The next prime is 129773953. The reversal of 129773898 is 898377921.

It can be written as a sum of positive squares in 2 ways, for example, as 116575209 + 13198689 = 10797^2 + 3633^2 .

It is a super-2 number, since 2×129773898² = 33682529204228808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123783 + ... + 124826.

Almost surely, 2^129773898 is an apocalyptic number.

129773898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129773898 is an abundant number, since it is smaller than the sum of its proper divisors (161099802).

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

129773898 is a wasteful number, since it uses less digits than its factorization.

129773898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248646 (or 248643 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 129773898 is about 11391.8347073683. The cubic root of 129773898 is about 506.2858425469.

The spelling of 129773898 in words is "one hundred twenty-nine million, seven hundred seventy-three thousand, eight hundred ninety-eight".