697116809 has 16 divisors (see below), whose sum is σ = 739167744. Its totient is φ = 656380800.

The previous prime is 697116793. The next prime is 697116829. The reversal of 697116809 is 908611796.

It is a cyclic number.

It is not a de Polignac number, because 697116809 - 2⁴ = 697116793 is a prime.

It is a Duffinian number.

697116809 is a modest number, since divided by 116809 gives 697 as remainder.

It is not an unprimeable number, because it can be changed into a prime (697116829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816827 + ... + 817679.

It is an arithmetic number, because the mean of its divisors is an integer number (46197984).

Almost surely, 2^697116809 is an apocalyptic number.

It is an amenable number.

697116809 is a deficient number, since it is larger than the sum of its proper divisors (42050935).

697116809 is a wasteful number, since it uses less digits than its factorization.

697116809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 697116809 is about 26402.9697003954. The cubic root of 697116809 is about 886.6832781073.

The spelling of 697116809 in words is "six hundred ninety-seven million, one hundred sixteen thousand, eight hundred nine".