697780273 has 2 divisors, whose sum is σ = 697780274. Its totient is φ = 697780272.

The previous prime is 697780241. The next prime is 697780297. The reversal of 697780273 is 372087796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543449344 + 154330929 = 23312^2 + 12423^2 .

It is a cyclic number.

It is not a de Polignac number, because 697780273 - 2⁵ = 697780241 is a prime.

It is not a weakly prime, because it can be changed into another prime (697786273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348890136 + 348890137.

It is an arithmetic number, because the mean of its divisors is an integer number (348890137).

Almost surely, 2^697780273 is an apocalyptic number.

It is an amenable number.

697780273 is a deficient number, since it is larger than the sum of its proper divisors (1).

697780273 is an equidigital number, since it uses as much as digits as its factorization.

697780273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 49.

The square root of 697780273 is about 26415.5309051323. The cubic root of 697780273 is about 886.9644820115.

The spelling of 697780273 in words is "six hundred ninety-seven million, seven hundred eighty thousand, two hundred seventy-three".