690111161 has 8 divisors (see below), whose sum is σ = 711407880. Its totient is φ = 668953728.

The previous prime is 690111157. The next prime is 690111203. The reversal of 690111161 is 161111096.

It can be written as a sum of positive squares in 4 ways, for example, as 87703225 + 602407936 = 9365^2 + 24544^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690111161 - 2² = 690111157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690111161.

It is not an unprimeable number, because it can be changed into a prime (690111061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24716 + ... + 44621.

It is an arithmetic number, because the mean of its divisors is an integer number (88925985).

Almost surely, 2^690111161 is an apocalyptic number.

It is an amenable number.

690111161 is a deficient number, since it is larger than the sum of its proper divisors (21296719).

690111161 is a wasteful number, since it uses less digits than its factorization.

690111161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69643.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 690111161 is about 26269.9669013876. The cubic root of 690111161 is about 883.7030428514.

The spelling of 690111161 in words is "six hundred ninety million, one hundred eleven thousand, one hundred sixty-one".