130640749 has 2 divisors, whose sum is σ = 130640750. Its totient is φ = 130640748.

The previous prime is 130640729. The next prime is 130640831. The reversal of 130640749 is 947046031.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96884649 + 33756100 = 9843^2 + 5810^2 .

It is a cyclic number.

It is not a de Polignac number, because 130640749 - 2⁵ = 130640717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130640729) 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 as a sum of consecutive naturals, namely, 65320374 + 65320375.

It is an arithmetic number, because the mean of its divisors is an integer number (65320375).

Almost surely, 2^130640749 is an apocalyptic number.

It is an amenable number.

130640749 is a deficient number, since it is larger than the sum of its proper divisors (1).

130640749 is an equidigital number, since it uses as much as digits as its factorization.

130640749 is an odious number, because the sum of its binary digits is odd.

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

The square root of 130640749 is about 11429.8184150056. The cubic root of 130640749 is about 507.4106214185.

The spelling of 130640749 in words is "one hundred thirty million, six hundred forty thousand, seven hundred forty-nine".