1564928473 has 2 divisors, whose sum is σ = 1564928474. Its totient is φ = 1564928472.

The previous prime is 1564928419. The next prime is 1564928501. The reversal of 1564928473 is 3748294651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1504508944 + 60419529 = 38788^2 + 7773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1564928473 - 2⁹ = 1564927961 is a prime.

It is a super-2 number, since 2×1564928473² = 4898002251212223458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1564928413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782464236 + 782464237.

It is an arithmetic number, because the mean of its divisors is an integer number (782464237).

Almost surely, 2^1564928473 is an apocalyptic number.

It is an amenable number.

1564928473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564928473 is an equidigital number, since it uses as much as digits as its factorization.

1564928473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The square root of 1564928473 is about 39559.1768493734. The cubic root of 1564928473 is about 1160.9980691220.

The spelling of 1564928473 in words is "one billion, five hundred sixty-four million, nine hundred twenty-eight thousand, four hundred seventy-three".