9157727497 has 2 divisors, whose sum is σ = 9157727498. Its totient is φ = 9157727496.

The previous prime is 9157727489. The next prime is 9157727507. The reversal of 9157727497 is 7947277519.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8973962361 + 183765136 = 94731^2 + 13556^2 .

It is a cyclic number.

It is not a de Polignac number, because 9157727497 - 2³ = 9157727489 is a prime.

It is not a weakly prime, because it can be changed into another prime (9157727197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4578863748 + 4578863749.

It is an arithmetic number, because the mean of its divisors is an integer number (4578863749).

Almost surely, 2^9157727497 is an apocalyptic number.

It is an amenable number.

9157727497 is a deficient number, since it is larger than the sum of its proper divisors (1).

9157727497 is an equidigital number, since it uses as much as digits as its factorization.

9157727497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7779240, while the sum is 58.

The square root of 9157727497 is about 95696.0160978502. The cubic root of 9157727497 is about 2092.1648696605.

The spelling of 9157727497 in words is "nine billion, one hundred fifty-seven million, seven hundred twenty-seven thousand, four hundred ninety-seven".