1309451343157 has 2 divisors, whose sum is σ = 1309451343158. Its totient is φ = 1309451343156.

The previous prime is 1309451343077. The next prime is 1309451343173. The reversal of 1309451343157 is 7513431549031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894630330801 + 414821012356 = 945849^2 + 644066^2 .

It is a cyclic number.

It is not a de Polignac number, because 1309451343157 - 2⁷ = 1309451343029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1309451341157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654725671578 + 654725671579.

It is an arithmetic number, because the mean of its divisors is an integer number (654725671579).

Almost surely, 2^{1309451343157} is an apocalyptic number.

It is an amenable number.

1309451343157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309451343157 is an equidigital number, since it uses as much as digits as its factorization.

1309451343157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 1309451343157 in words is "one trillion, three hundred nine billion, four hundred fifty-one million, three hundred forty-three thousand, one hundred fifty-seven".