564401919 has 4 divisors (see below), whose sum is σ = 752535896. Its totient is φ = 376267944.

The previous prime is 564401917. The next prime is 564401939. The reversal of 564401919 is 919104465.

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

It is not a de Polignac number, because 564401919 - 2¹ = 564401917 is a prime.

It is a super-2 number, since 2×564401919² = 637099052341765122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564401917) 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, 94066984 + ... + 94066989.

It is an arithmetic number, because the mean of its divisors is an integer number (188133974).

Almost surely, 2^564401919 is an apocalyptic number.

564401919 is a deficient number, since it is larger than the sum of its proper divisors (188133977).

564401919 is a wasteful number, since it uses less digits than its factorization.

564401919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188133976.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 564401919 is about 23757.1445885233. The cubic root of 564401919 is about 826.4111357026.

The spelling of 564401919 in words is "five hundred sixty-four million, four hundred one thousand, nine hundred nineteen".