130709921 has 2 divisors, whose sum is σ = 130709922. Its totient is φ = 130709920.

The previous prime is 130709881. The next prime is 130710001. The reversal of 130709921 is 129907031.

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., 78074896 + 52635025 = 8836^2 + 7255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130709921 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (130709221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65354960 + 65354961.

It is an arithmetic number, because the mean of its divisors is an integer number (65354961).

Almost surely, 2^130709921 is an apocalyptic number.

It is an amenable number.

130709921 is a deficient number, since it is larger than the sum of its proper divisors (1).

130709921 is an equidigital number, since it uses as much as digits as its factorization.

130709921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 130709921 is about 11432.8439594005. The cubic root of 130709921 is about 507.5001606445.

The spelling of 130709921 in words is "one hundred thirty million, seven hundred nine thousand, nine hundred twenty-one".