84687797 has 2 divisors, whose sum is σ = 84687798. Its totient is φ = 84687796.

The previous prime is 84687787. The next prime is 84687803. The reversal of 84687797 is 79778648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83923921 + 763876 = 9161^2 + 874^2 .

It is a cyclic number.

It is not a de Polignac number, because 84687797 - 2⁴ = 84687781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84687767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42343898 + 42343899.

It is an arithmetic number, because the mean of its divisors is an integer number (42343899).

Almost surely, 2^84687797 is an apocalyptic number.

It is an amenable number.

84687797 is a deficient number, since it is larger than the sum of its proper divisors (1).

84687797 is an equidigital number, since it uses as much as digits as its factorization.

84687797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 56.

The square root of 84687797 is about 9202.5972964158. The cubic root of 84687797 is about 439.1439917304.

The spelling of 84687797 in words is "eighty-four million, six hundred eighty-seven thousand, seven hundred ninety-seven".