84869657 has 2 divisors, whose sum is σ = 84869658. Its totient is φ = 84869656.

The previous prime is 84869623. The next prime is 84869663. The reversal of 84869657 is 75696848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45981961 + 38887696 = 6781^2 + 6236^2 .

It is a cyclic number.

It is not a de Polignac number, because 84869657 - 2²⁰ = 83821081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84869599 and 84869608.

It is not a weakly prime, because it can be changed into another prime (84869677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42434828 + 42434829.

It is an arithmetic number, because the mean of its divisors is an integer number (42434829).

Almost surely, 2^84869657 is an apocalyptic number.

It is an amenable number.

84869657 is a deficient number, since it is larger than the sum of its proper divisors (1).

84869657 is an equidigital number, since it uses as much as digits as its factorization.

84869657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The square root of 84869657 is about 9212.4729036237. The cubic root of 84869657 is about 439.4581087228.

The spelling of 84869657 in words is "eighty-four million, eight hundred sixty-nine thousand, six hundred fifty-seven".