9661397 has 2 divisors, whose sum is σ = 9661398. Its totient is φ = 9661396.

The previous prime is 9661391. The next prime is 9661409. The reversal of 9661397 is 7931669.

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., 9647236 + 14161 = 3106^2 + 119^2 .

It is a cyclic number.

It is not a de Polignac number, because 9661397 - 2¹⁸ = 9399253 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9661391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830698 + 4830699.

It is an arithmetic number, because the mean of its divisors is an integer number (4830699).

Almost surely, 2^9661397 is an apocalyptic number.

It is an amenable number.

9661397 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661397 is an equidigital number, since it uses as much as digits as its factorization.

9661397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 41.

The square root of 9661397 is about 3108.2787841505. The cubic root of 9661397 is about 212.9838350197.

The spelling of 9661397 in words is "nine million, six hundred sixty-one thousand, three hundred ninety-seven".