1445213389 has 2 divisors, whose sum is σ = 1445213390. Its totient is φ = 1445213388.

The previous prime is 1445213311. The next prime is 1445213423. The reversal of 1445213389 is 9833125441.

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., 1363455625 + 81757764 = 36925^2 + 9042^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445213389 - 2⁷ = 1445213261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445213089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722606694 + 722606695.

It is an arithmetic number, because the mean of its divisors is an integer number (722606695).

Almost surely, 2^1445213389 is an apocalyptic number.

It is an amenable number.

1445213389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445213389 is an equidigital number, since it uses as much as digits as its factorization.

1445213389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 1445213389 is about 38015.9622921741. The cubic root of 1445213389 is about 1130.6043674910.

The spelling of 1445213389 in words is "one billion, four hundred forty-five million, two hundred thirteen thousand, three hundred eighty-nine".