1345389923 has 4 divisors (see below), whose sum is σ = 1345561008. Its totient is φ = 1345218840.

The previous prime is 1345389919. The next prime is 1345389931. The reversal of 1345389923 is 3299835431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1345389923 - 2² = 1345389919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345389973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73148 + ... + 89673.

It is an arithmetic number, because the mean of its divisors is an integer number (336390252).

Almost surely, 2^1345389923 is an apocalyptic number.

1345389923 is a deficient number, since it is larger than the sum of its proper divisors (171085).

1345389923 is an equidigital number, since it uses as much as digits as its factorization.

1345389923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171084.

The product of its digits is 699840, while the sum is 47.

The square root of 1345389923 is about 36679.5572901310. The cubic root of 1345389923 is about 1103.9499652965.

The spelling of 1345389923 in words is "one billion, three hundred forty-five million, three hundred eighty-nine thousand, nine hundred twenty-three".