97678961 has 2 divisors, whose sum is σ = 97678962. Its totient is φ = 97678960.

The previous prime is 97678949. The next prime is 97679017. The reversal of 97678961 is 16987679.

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., 87534736 + 10144225 = 9356^2 + 3185^2 .

It is an emirp because it is prime and its reverse (16987679) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97678961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97678901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48839480 + 48839481.

It is an arithmetic number, because the mean of its divisors is an integer number (48839481).

Almost surely, 2^97678961 is an apocalyptic number.

It is an amenable number.

97678961 is a deficient number, since it is larger than the sum of its proper divisors (1).

97678961 is an equidigital number, since it uses as much as digits as its factorization.

97678961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 53.

The square root of 97678961 is about 9883.2667170324. The cubic root of 97678961 is about 460.5396329265.

The spelling of 97678961 in words is "ninety-seven million, six hundred seventy-eight thousand, nine hundred sixty-one".