84997261 has 2 divisors, whose sum is σ = 84997262. Its totient is φ = 84997260.

The previous prime is 84997207. The next prime is 84997267. The reversal of 84997261 is 16279948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50552100 + 34445161 = 7110^2 + 5869^2 .

It is a cyclic number.

It is not a de Polignac number, because 84997261 - 2⁹ = 84996749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84997267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42498630 + 42498631.

It is an arithmetic number, because the mean of its divisors is an integer number (42498631).

Almost surely, 2^84997261 is an apocalyptic number.

It is an amenable number.

84997261 is a deficient number, since it is larger than the sum of its proper divisors (1).

84997261 is an equidigital number, since it uses as much as digits as its factorization.

84997261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 84997261 is about 9219.3959129652. The cubic root of 84997261 is about 439.6782444527.

It can be divided in two parts, 84997 and 261, that added together give a palindrome (85258).

The spelling of 84997261 in words is "eighty-four million, nine hundred ninety-seven thousand, two hundred sixty-one".