961797897 has 12 divisors (see below), whose sum is σ = 1391143104. Its totient is φ = 640331160.

The previous prime is 961797883. The next prime is 961797913. The reversal of 961797897 is 798797169.

961797897 is a `hidden beast` number, since 9 + 617 + 9 + 7 + 8 + 9 + 7 = 666.

It is not a de Polignac number, because 961797897 - 2⁷ = 961797769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (961797817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65229 + ... + 78602.

It is an arithmetic number, because the mean of its divisors is an integer number (115928592).

Almost surely, 2^961797897 is an apocalyptic number.

It is an amenable number.

961797897 is a deficient number, since it is larger than the sum of its proper divisors (429345207).

961797897 is a wasteful number, since it uses less digits than its factorization.

961797897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144580 (or 144577 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 63.

The square root of 961797897 is about 31012.8666362850. The cubic root of 961797897 is about 987.1002783651.

The spelling of 961797897 in words is "nine hundred sixty-one million, seven hundred ninety-seven thousand, eight hundred ninety-seven".