23198661 has 12 divisors (see below), whose sum is σ = 34327020. Its totient is φ = 15088320.

The previous prime is 23198657. The next prime is 23198663. The reversal of 23198661 is 16689132.

It can be written as a sum of positive squares in 2 ways, for example, as 2268036 + 20930625 = 1506^2 + 4575^2 .

It is not a de Polignac number, because 23198661 - 2² = 23198657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23198663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31066 + ... + 31803.

It is an arithmetic number, because the mean of its divisors is an integer number (2860585).

Almost surely, 2^23198661 is an apocalyptic number.

It is an amenable number.

23198661 is a deficient number, since it is larger than the sum of its proper divisors (11128359).

23198661 is a wasteful number, since it uses less digits than its factorization.

23198661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62916 (or 62913 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 23198661 is about 4816.4988321394. The cubic root of 23198661 is about 285.2031423351.

The spelling of 23198661 in words is "twenty-three million, one hundred ninety-eight thousand, six hundred sixty-one".