1345471993 has 2 divisors, whose sum is σ = 1345471994. Its totient is φ = 1345471992.

The previous prime is 1345471991. The next prime is 1345471997. The reversal of 1345471993 is 3991745431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1335756304 + 9715689 = 36548^2 + 3117^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345471993 - 2¹ = 1345471991 is a prime.

Together with 1345471991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1345471991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672735996 + 672735997.

It is an arithmetic number, because the mean of its divisors is an integer number (672735997).

Almost surely, 2^1345471993 is an apocalyptic number.

It is an amenable number.

1345471993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345471993 is an equidigital number, since it uses as much as digits as its factorization.

1345471993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 1345471993 is about 36680.6760161260. The cubic root of 1345471993 is about 1103.9724121550.

The spelling of 1345471993 in words is "one billion, three hundred forty-five million, four hundred seventy-one thousand, nine hundred ninety-three".