84810961 has 2 divisors, whose sum is σ = 84810962. Its totient is φ = 84810960.

The previous prime is 84810953. The next prime is 84810997. The reversal of 84810961 is 16901848.

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., 80209936 + 4601025 = 8956^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 84810961 - 2³ = 84810953 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84810961.

It is not a weakly prime, because it can be changed into another prime (84810931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42405480 + 42405481.

It is an arithmetic number, because the mean of its divisors is an integer number (42405481).

Almost surely, 2^84810961 is an apocalyptic number.

It is an amenable number.

84810961 is a deficient number, since it is larger than the sum of its proper divisors (1).

84810961 is an equidigital number, since it uses as much as digits as its factorization.

84810961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 84810961 is about 9209.2866716158. The cubic root of 84810961 is about 439.3567753651.

The spelling of 84810961 in words is "eighty-four million, eight hundred ten thousand, nine hundred sixty-one".