1345591873 has 2 divisors, whose sum is σ = 1345591874. Its totient is φ = 1345591872.

The previous prime is 1345591861. The next prime is 1345591879. The reversal of 1345591873 is 3781955431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 719741584 + 625850289 = 26828^2 + 25017^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345591873 - 2²⁹ = 808720961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345591879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672795936 + 672795937.

It is an arithmetic number, because the mean of its divisors is an integer number (672795937).

Almost surely, 2^1345591873 is an apocalyptic number.

It is an amenable number.

1345591873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345591873 is an equidigital number, since it uses as much as digits as its factorization.

1345591873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 46.

The square root of 1345591873 is about 36682.3100826543. The cubic root of 1345591873 is about 1104.0051987367.

The spelling of 1345591873 in words is "one billion, three hundred forty-five million, five hundred ninety-one thousand, eight hundred seventy-three".