1345163761 has 2 divisors, whose sum is σ = 1345163762. Its totient is φ = 1345163760.

The previous prime is 1345163737. The next prime is 1345163779. The reversal of 1345163761 is 1673615431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1331885025 + 13278736 = 36495^2 + 3644^2 .

It is an emirp because it is prime and its reverse (1673615431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1345163761 - 2⁹ = 1345163249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1345163761.

It is not a weakly prime, because it can be changed into another prime (1345163861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672581880 + 672581881.

It is an arithmetic number, because the mean of its divisors is an integer number (672581881).

Almost surely, 2^1345163761 is an apocalyptic number.

It is an amenable number.

1345163761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345163761 is an equidigital number, since it uses as much as digits as its factorization.

1345163761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 1345163761 is about 36676.4742171327. The cubic root of 1345163761 is about 1103.8881032992. Note that the first 3 decimals are identical.

The spelling of 1345163761 in words is "one billion, three hundred forty-five million, one hundred sixty-three thousand, seven hundred sixty-one".