686974297 has 2 divisors, whose sum is σ = 686974298. Its totient is φ = 686974296.

The previous prime is 686974261. The next prime is 686974313. The reversal of 686974297 is 792479686.

686974297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602260681 + 84713616 = 24541^2 + 9204^2 .

It is a cyclic number.

It is not a de Polignac number, because 686974297 - 2²³ = 678585689 is a prime.

It is not a weakly prime, because it can be changed into another prime (686974237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343487148 + 343487149.

It is an arithmetic number, because the mean of its divisors is an integer number (343487149).

Almost surely, 2^686974297 is an apocalyptic number.

It is an amenable number.

686974297 is a deficient number, since it is larger than the sum of its proper divisors (1).

686974297 is an equidigital number, since it uses as much as digits as its factorization.

686974297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 58.

The square root of 686974297 is about 26210.1945242686. The cubic root of 686974297 is about 882.3620671092.

The spelling of 686974297 in words is "six hundred eighty-six million, nine hundred seventy-four thousand, two hundred ninety-seven".