1153445399 has 2 divisors, whose sum is σ = 1153445400. Its totient is φ = 1153445398.

The previous prime is 1153445389. The next prime is 1153445411. The reversal of 1153445399 is 9935443511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1153445399 - 2⁸ = 1153445143 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1153445389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576722699 + 576722700.

It is an arithmetic number, because the mean of its divisors is an integer number (576722700).

Almost surely, 2^1153445399 is an apocalyptic number.

1153445399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153445399 is an equidigital number, since it uses as much as digits as its factorization.

1153445399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 44.

The square root of 1153445399 is about 33962.4115604296. The cubic root of 1153445399 is about 1048.7348023405.

The spelling of 1153445399 in words is "one billion, one hundred fifty-three million, four hundred forty-five thousand, three hundred ninety-nine".