130642279 has 4 divisors (see below), whose sum is σ = 131319376. Its totient is φ = 129965184.

The previous prime is 130642273. The next prime is 130642289. The reversal of 130642279 is 972246031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 130642279 - 2⁵ = 130642247 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 (130642273) 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, 338259 + ... + 338644.

It is an arithmetic number, because the mean of its divisors is an integer number (32829844).

Almost surely, 2^130642279 is an apocalyptic number.

130642279 is a deficient number, since it is larger than the sum of its proper divisors (677097).

130642279 is an equidigital number, since it uses as much as digits as its factorization.

130642279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677096.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 130642279 is about 11429.8853450067. The cubic root of 130642279 is about 507.4126022584.

The spelling of 130642279 in words is "one hundred thirty million, six hundred forty-two thousand, two hundred seventy-nine".