130640434 has 4 divisors (see below), whose sum is σ = 195960654. Its totient is φ = 65320216.

The previous prime is 130640387. The next prime is 130640443. The reversal of 130640434 is 434046031.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 122213025 + 8427409 = 11055^2 + 2903^2 .

It is a junction number, because it is equal to n+sod(n) for n = 130640399 and 130640408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32660107 + ... + 32660110.

Almost surely, 2^130640434 is an apocalyptic number.

130640434 is a deficient number, since it is larger than the sum of its proper divisors (65320220).

130640434 is an equidigital number, since it uses as much as digits as its factorization.

130640434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65320219.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 130640434 is about 11429.8046352508. The cubic root of 130640434 is about 507.4102135966.

Adding to 130640434 its reverse (434046031), we get a palindrome (564686465).

The spelling of 130640434 in words is "one hundred thirty million, six hundred forty thousand, four hundred thirty-four".