1564913423 has 4 divisors (see below), whose sum is σ = 1565035920. Its totient is φ = 1564790928.

The previous prime is 1564913419. The next prime is 1564913437. The reversal of 1564913423 is 3243194651.

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 1564913423 - 2² = 1564913419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1564913023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39515 + ... + 68492.

It is an arithmetic number, because the mean of its divisors is an integer number (391258980).

Almost surely, 2^1564913423 is an apocalyptic number.

1564913423 is a deficient number, since it is larger than the sum of its proper divisors (122497).

1564913423 is a wasteful number, since it uses less digits than its factorization.

1564913423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122496.

The product of its digits is 77760, while the sum is 38.

The square root of 1564913423 is about 39558.9866275667. The cubic root of 1564913423 is about 1160.9943473168.

The spelling of 1564913423 in words is "one billion, five hundred sixty-four million, nine hundred thirteen thousand, four hundred twenty-three".