130304639 has 4 divisors (see below), whose sum is σ = 133826424. Its totient is φ = 126782856.

The previous prime is 130304623. The next prime is 130304653. The reversal of 130304639 is 936403031.

130304639 = 1028² + 1029² + ... + 1138².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936403031 = 1171 ⋅799661.

It is a cyclic number.

It is not a de Polignac number, because 130304639 - 2⁴ = 130304623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130304689) 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, 1760837 + ... + 1760910.

It is an arithmetic number, because the mean of its divisors is an integer number (33456606).

Almost surely, 2^130304639 is an apocalyptic number.

130304639 is a deficient number, since it is larger than the sum of its proper divisors (3521785).

130304639 is an equidigital number, since it uses as much as digits as its factorization.

130304639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521784.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 130304639 is about 11415.1057375742. The cubic root of 130304639 is about 506.9750956130.

The spelling of 130304639 in words is "one hundred thirty million, three hundred four thousand, six hundred thirty-nine".