697671869 has 2 divisors, whose sum is σ = 697671870. Its totient is φ = 697671868.

The previous prime is 697671859. The next prime is 697671881. The reversal of 697671869 is 968176796.

697671869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 593896900 + 103774969 = 24370^2 + 10187^2 .

It is a cyclic number.

It is not a de Polignac number, because 697671869 - 2²⁸ = 429236413 is a prime.

It is a super-2 number, since 2×697671869² = 973492073587906322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697671859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348835934 + 348835935.

It is an arithmetic number, because the mean of its divisors is an integer number (348835935).

Almost surely, 2^697671869 is an apocalyptic number.

It is an amenable number.

697671869 is a deficient number, since it is larger than the sum of its proper divisors (1).

697671869 is an equidigital number, since it uses as much as digits as its factorization.

697671869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 59.

The square root of 697671869 is about 26413.4789264875. The cubic root of 697671869 is about 886.9185480305.

The spelling of 697671869 in words is "six hundred ninety-seven million, six hundred seventy-one thousand, eight hundred sixty-nine".