697976161 has 4 divisors (see below), whose sum is σ = 698044932. Its totient is φ = 697907392.

The previous prime is 697976137. The next prime is 697976171. The reversal of 697976161 is 161679796.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 154853136 + 543123025 = 12444^2 + 23305^2 .

It is a cyclic number.

It is not a de Polignac number, because 697976161 - 2⁷ = 697976033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 697976099 and 697976108.

It is not an unprimeable number, because it can be changed into a prime (697976131) 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 in 3 ways as a sum of consecutive naturals, for example, 15820 + ... + 40573.

It is an arithmetic number, because the mean of its divisors is an integer number (174511233).

Almost surely, 2^697976161 is an apocalyptic number.

It is an amenable number.

697976161 is a deficient number, since it is larger than the sum of its proper divisors (68771).

697976161 is a wasteful number, since it uses less digits than its factorization.

697976161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68770.

The product of its digits is 857304, while the sum is 52.

The square root of 697976161 is about 26419.2384636651. The cubic root of 697976161 is about 887.0474734866.

The spelling of 697976161 in words is "six hundred ninety-seven million, nine hundred seventy-six thousand, one hundred sixty-one".