130640731 has 8 divisors (see below), whose sum is σ = 141254064. Its totient is φ = 120108000.

The previous prime is 130640729. The next prime is 130640749. The reversal of 130640731 is 137046031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 130640731 - 2¹ = 130640729 is a prime.

It is a super-2 number, since 2×130640731² = 34134001192428722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130640696 and 130640705.

It is not an unprimeable number, because it can be changed into a prime (130640131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16756 + ... + 23281.

It is an arithmetic number, because the mean of its divisors is an integer number (17656758).

Almost surely, 2^130640731 is an apocalyptic number.

130640731 is a deficient number, since it is larger than the sum of its proper divisors (10613333).

130640731 is a wasteful number, since it uses less digits than its factorization.

130640731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40301.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 130640731 is about 11429.8176275914. The cubic root of 130640731 is about 507.4105981144.

Adding to 130640731 its reverse (137046031), we get a palindrome (267686762).

The spelling of 130640731 in words is "one hundred thirty million, six hundred forty thousand, seven hundred thirty-one".