1573148749 has 2 divisors, whose sum is σ = 1573148750. Its totient is φ = 1573148748.

The previous prime is 1573148747. The next prime is 1573148789. The reversal of 1573148749 is 9478413751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 979251849 + 593896900 = 31293^2 + 24370^2 .

It is an emirp because it is prime and its reverse (9478413751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1573148749 - 2¹ = 1573148747 is a prime.

Together with 1573148747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1573148743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786574374 + 786574375.

It is an arithmetic number, because the mean of its divisors is an integer number (786574375).

Almost surely, 2^1573148749 is an apocalyptic number.

It is an amenable number.

1573148749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1573148749 is an equidigital number, since it uses as much as digits as its factorization.

1573148749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 49.

The square root of 1573148749 is about 39662.9392380343. The cubic root of 1573148749 is about 1163.0273552006.

The spelling of 1573148749 in words is "one billion, five hundred seventy-three million, one hundred forty-eight thousand, seven hundred forty-nine".