130381661 has 2 divisors, whose sum is σ = 130381662. Its totient is φ = 130381660.

The previous prime is 130381649. The next prime is 130381697. The reversal of 130381661 is 166183031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103652761 + 26728900 = 10181^2 + 5170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130381661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130381621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65190830 + 65190831.

It is an arithmetic number, because the mean of its divisors is an integer number (65190831).

Almost surely, 2^130381661 is an apocalyptic number.

It is an amenable number.

130381661 is a deficient number, since it is larger than the sum of its proper divisors (1).

130381661 is an equidigital number, since it uses as much as digits as its factorization.

130381661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 130381661 is about 11418.4789267222. The cubic root of 130381661 is about 507.0749655407.

The spelling of 130381661 in words is "one hundred thirty million, three hundred eighty-one thousand, six hundred sixty-one".