9051391897 has 2 divisors, whose sum is σ = 9051391898. Its totient is φ = 9051391896.

The previous prime is 9051391883. The next prime is 9051391901. The reversal of 9051391897 is 7981931509.

It is a happy number.

9051391897 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5736396121 + 3314995776 = 75739^2 + 57576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9051391897 is a prime.

It is not a weakly prime, because it can be changed into another prime (9051391397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4525695948 + 4525695949.

It is an arithmetic number, because the mean of its divisors is an integer number (4525695949).

Almost surely, 2^9051391897 is an apocalyptic number.

It is an amenable number.

9051391897 is a deficient number, since it is larger than the sum of its proper divisors (1).

9051391897 is an equidigital number, since it uses as much as digits as its factorization.

9051391897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 52.

The square root of 9051391897 is about 95138.8033191505. The cubic root of 9051391897 is about 2084.0355498600.

The spelling of 9051391897 in words is "nine billion, fifty-one million, three hundred ninety-one thousand, eight hundred ninety-seven".