1573145647 has 2 divisors, whose sum is σ = 1573145648. Its totient is φ = 1573145646.

The previous prime is 1573145627. The next prime is 1573145657. The reversal of 1573145647 is 7465413751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1573145647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1573145627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786572823 + 786572824.

It is an arithmetic number, because the mean of its divisors is an integer number (786572824).

Almost surely, 2^1573145647 is an apocalyptic number.

1573145647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1573145647 is an equidigital number, since it uses as much as digits as its factorization.

1573145647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 43.

The square root of 1573145647 is about 39662.9001335001. The cubic root of 1573145647 is about 1163.0265907649.

The spelling of 1573145647 in words is "one billion, five hundred seventy-three million, one hundred forty-five thousand, six hundred forty-seven".