231648969 has 16 divisors (see below), whose sum is σ = 326009600. Its totient is φ = 145904976.

The previous prime is 231648961. The next prime is 231648979. The reversal of 231648969 is 969846132.

It is not a de Polignac number, because 231648969 - 2³ = 231648961 is a prime.

It is a super-2 number, since 2×231648969² = 107322489677525922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231648961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16242 + ... + 26964.

It is an arithmetic number, because the mean of its divisors is an integer number (20375600).

Almost surely, 2^231648969 is an apocalyptic number.

It is an amenable number.

231648969 is a deficient number, since it is larger than the sum of its proper divisors (94360631).

231648969 is a wasteful number, since it uses less digits than its factorization.

231648969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11124.

The product of its digits is 559872, while the sum is 48.

The square root of 231648969 is about 15220.0186924984. The cubic root of 231648969 is about 614.1533011023.

The spelling of 231648969 in words is "two hundred thirty-one million, six hundred forty-eight thousand, nine hundred sixty-nine".