1573221379 has 2 divisors, whose sum is σ = 1573221380. Its totient is φ = 1573221378.

The previous prime is 1573221347. The next prime is 1573221383. The reversal of 1573221379 is 9731223751.

It is a strong prime.

It is an emirp because it is prime and its reverse (9731223751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1573221379 - 2⁵ = 1573221347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1573221079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786610689 + 786610690.

It is an arithmetic number, because the mean of its divisors is an integer number (786610690).

Almost surely, 2^1573221379 is an apocalyptic number.

1573221379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1573221379 is an equidigital number, since it uses as much as digits as its factorization.

1573221379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 1573221379 is about 39663.8548177053. The cubic root of 1573221379 is about 1163.0452533549.

The spelling of 1573221379 in words is "one billion, five hundred seventy-three million, two hundred twenty-one thousand, three hundred seventy-nine".