1623346345 has 4 divisors (see below), whose sum is σ = 1948015620. Its totient is φ = 1298677072.

The previous prime is 1623346331. The next prime is 1623346391. The reversal of 1623346345 is 5436433261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5436433261 = 7 ⋅776633323.

It can be written as a sum of positive squares in 2 ways, for example, as 201980944 + 1421365401 = 14212^2 + 37701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1623346345 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162334630 + ... + 162334639.

It is an arithmetic number, because the mean of its divisors is an integer number (487003905).

Almost surely, 2^1623346345 is an apocalyptic number.

It is an amenable number.

1623346345 is a deficient number, since it is larger than the sum of its proper divisors (324669275).

1623346345 is an equidigital number, since it uses as much as digits as its factorization.

1623346345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324669274.

The product of its digits is 155520, while the sum is 37.

The square root of 1623346345 is about 40290.7724547445. The cubic root of 1623346345 is about 1175.2684088795.

The spelling of 1623346345 in words is "one billion, six hundred twenty-three million, three hundred forty-six thousand, three hundred forty-five".