1349666923 has 4 divisors (see below), whose sum is σ = 1472363928. Its totient is φ = 1226969920.

The previous prime is 1349666869. The next prime is 1349666947. The reversal of 1349666923 is 3296669431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3296669431 = 11 ⋅299697221.

It is a de Polignac number, because none of the positive numbers 2^k-1349666923 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1349666963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61348486 + ... + 61348507.

It is an arithmetic number, because the mean of its divisors is an integer number (368090982).

Almost surely, 2^1349666923 is an apocalyptic number.

1349666923 is a deficient number, since it is larger than the sum of its proper divisors (122697005).

1349666923 is a wasteful number, since it uses less digits than its factorization.

1349666923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122697004.

The product of its digits is 1259712, while the sum is 49.

The square root of 1349666923 is about 36737.8132582765. The cubic root of 1349666923 is about 1105.1185483263.

The spelling of 1349666923 in words is "one billion, three hundred forty-nine million, six hundred sixty-six thousand, nine hundred twenty-three".