1301173009 has 2 divisors, whose sum is σ = 1301173010. Its totient is φ = 1301173008.

The previous prime is 1301172973. The next prime is 1301173019. The reversal of 1301173009 is 9003711031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1285939600 + 15233409 = 35860^2 + 3903^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301173009 - 2¹¹ = 1301170961 is a prime.

It is a super-2 number, since 2×1301173009² = 3386102398700228162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1301173019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650586504 + 650586505.

It is an arithmetic number, because the mean of its divisors is an integer number (650586505).

Almost surely, 2^1301173009 is an apocalyptic number.

It is an amenable number.

1301173009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301173009 is an equidigital number, since it uses as much as digits as its factorization.

1301173009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 1301173009 is about 36071.7757949342. The cubic root of 1301173009 is about 1091.7210442958.

The spelling of 1301173009 in words is "one billion, three hundred one million, one hundred seventy-three thousand, nine".