9897557959 has 2 divisors, whose sum is σ = 9897557960. Its totient is φ = 9897557958.

The previous prime is 9897557951. The next prime is 9897557993. The reversal of 9897557959 is 9597557989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9897557959 - 2³ = 9897557951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9897557891 and 9897557900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9897557951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948778979 + 4948778980.

It is an arithmetic number, because the mean of its divisors is an integer number (4948778980).

Almost surely, 2^9897557959 is an apocalyptic number.

9897557959 is a deficient number, since it is larger than the sum of its proper divisors (1).

9897557959 is an equidigital number, since it uses as much as digits as its factorization.

9897557959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 321489000, while the sum is 73.

The square root of 9897557959 is about 99486.4712360429. The cubic root of 9897557959 is about 2147.0526015820.

The spelling of 9897557959 in words is "nine billion, eight hundred ninety-seven million, five hundred fifty-seven thousand, nine hundred fifty-nine".