9028689091 has 2 divisors, whose sum is σ = 9028689092. Its totient is φ = 9028689090.

The previous prime is 9028689079. The next prime is 9028689127. The reversal of 9028689091 is 1909868209.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9028689091 is a prime.

It is not a weakly prime, because it can be changed into another prime (9028689011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4514344545 + 4514344546.

It is an arithmetic number, because the mean of its divisors is an integer number (4514344546).

Almost surely, 2^9028689091 is an apocalyptic number.

9028689091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9028689091 is an equidigital number, since it uses as much as digits as its factorization.

9028689091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 9028689091 is about 95019.4142846608. The cubic root of 9028689091 is about 2082.2916903548.

The spelling of 9028689091 in words is "nine billion, twenty-eight million, six hundred eighty-nine thousand, ninety-one".