130209994 has 4 divisors (see below), whose sum is σ = 195314994. Its totient is φ = 65104996.

The previous prime is 130209979. The next prime is 130209997. The reversal of 130209994 is 499902031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499902031 = 439 ⋅1138729.

It can be written as a sum of positive squares in only one way, i.e., 98704225 + 31505769 = 9935^2 + 5613^2 .

It is not an unprimeable number, because it can be changed into a prime (130209997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32552497 + ... + 32552500.

Almost surely, 2^130209994 is an apocalyptic number.

130209994 is a deficient number, since it is larger than the sum of its proper divisors (65105000).

130209994 is an equidigital number, since it uses as much as digits as its factorization.

130209994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65104999.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 130209994 is about 11410.9593812265. The cubic root of 130209994 is about 506.8523210641.

The spelling of 130209994 in words is "one hundred thirty million, two hundred nine thousand, nine hundred ninety-four".