130423906 has 4 divisors (see below), whose sum is σ = 195635862. Its totient is φ = 65211952.

The previous prime is 130423903. The next prime is 130423907. The reversal of 130423906 is 609324031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609324031 = 2819 ⋅216149.

It can be written as a sum of positive squares in only one way, i.e., 91872225 + 38551681 = 9585^2 + 6209^2 .

It is a super-3 number, since 3×130423906³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (130423903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32605975 + ... + 32605978.

Almost surely, 2^130423906 is an apocalyptic number.

130423906 is a deficient number, since it is larger than the sum of its proper divisors (65211956).

130423906 is an equidigital number, since it uses as much as digits as its factorization.

130423906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65211955.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 130423906 is about 11420.3286292471. The cubic root of 130423906 is about 507.1297254627.

Adding to 130423906 its reverse (609324031), we get a palindrome (739747937).

The spelling of 130423906 in words is "one hundred thirty million, four hundred twenty-three thousand, nine hundred six".