1345745923 has 2 divisors, whose sum is σ = 1345745924. Its totient is φ = 1345745922.

The previous prime is 1345745909. The next prime is 1345745941. The reversal of 1345745923 is 3295475431.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345745923 is a prime.

It is a super-2 number, since 2×1345745923² = 3622064178542243858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1345745923.

It is not a weakly prime, because it can be changed into another prime (1345745963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672872961 + 672872962.

It is an arithmetic number, because the mean of its divisors is an integer number (672872962).

Almost surely, 2^1345745923 is an apocalyptic number.

1345745923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345745923 is an equidigital number, since it uses as much as digits as its factorization.

1345745923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 43.

The square root of 1345745923 is about 36684.4098085277. The cubic root of 1345745923 is about 1104.0473277840.

The spelling of 1345745923 in words is "one billion, three hundred forty-five million, seven hundred forty-five thousand, nine hundred twenty-three".