8045691389 has 2 divisors, whose sum is σ = 8045691390. Its totient is φ = 8045691388.

The previous prime is 8045691377. The next prime is 8045691397. The reversal of 8045691389 is 9831965408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7549872100 + 495819289 = 86890^2 + 22267^2 .

It is a cyclic number.

It is not a de Polignac number, because 8045691389 - 2²⁸ = 7777255933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8045691389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8045691989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4022845694 + 4022845695.

It is an arithmetic number, because the mean of its divisors is an integer number (4022845695).

Almost surely, 2^8045691389 is an apocalyptic number.

It is an amenable number.

8045691389 is a deficient number, since it is larger than the sum of its proper divisors (1).

8045691389 is an equidigital number, since it uses as much as digits as its factorization.

8045691389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The square root of 8045691389 is about 89697.7780605518. The cubic root of 8045691389 is about 2003.8003896950.

The spelling of 8045691389 in words is "eight billion, forty-five million, six hundred ninety-one thousand, three hundred eighty-nine".