1349917993 has 2 divisors, whose sum is σ = 1349917994. Its totient is φ = 1349917992.

The previous prime is 1349917991. The next prime is 1349917999. The reversal of 1349917993 is 3997199431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1087218729 + 262699264 = 32973^2 + 16208^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349917993 - 2¹ = 1349917991 is a prime.

Together with 1349917991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1349917991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 674958996 + 674958997.

It is an arithmetic number, because the mean of its divisors is an integer number (674958997).

Almost surely, 2^1349917993 is an apocalyptic number.

It is an amenable number.

1349917993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1349917993 is an equidigital number, since it uses as much as digits as its factorization.

1349917993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653372, while the sum is 55.

The square root of 1349917993 is about 36741.2301508809. The cubic root of 1349917993 is about 1105.1870701485.

The spelling of 1349917993 in words is "one billion, three hundred forty-nine million, nine hundred seventeen thousand, nine hundred ninety-three".