1573987243 has 2 divisors, whose sum is σ = 1573987244. Its totient is φ = 1573987242.

The previous prime is 1573987213. The next prime is 1573987321. The reversal of 1573987243 is 3427893751.

It is a weak prime.

It is an emirp because it is prime and its reverse (3427893751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1573987243 - 2⁹ = 1573986731 is a prime.

It is a super-2 number, since 2×1573987243² = 4954871682253482098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1573987213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786993621 + 786993622.

It is an arithmetic number, because the mean of its divisors is an integer number (786993622).

Almost surely, 2^1573987243 is an apocalyptic number.

1573987243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1573987243 is an equidigital number, since it uses as much as digits as its factorization.

1573987243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 1573987243 is about 39673.5080752887. The cubic root of 1573987243 is about 1163.2339511018.

The spelling of 1573987243 in words is "one billion, five hundred seventy-three million, nine hundred eighty-seven thousand, two hundred forty-three".