231791869 has 8 divisors (see below), whose sum is σ = 234396000. Its totient is φ = 229194000.

The previous prime is 231791839. The next prime is 231791873. The reversal of 231791869 is 968197132.

It is a happy number.

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 231791869 - 2⁷ = 231791741 is a prime.

It is a super-2 number, since 2×231791869² = 107454941069026322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231791839) 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, 150634 + ... + 152164.

It is an arithmetic number, because the mean of its divisors is an integer number (29299500).

Almost surely, 2^231791869 is an apocalyptic number.

It is an amenable number.

231791869 is a deficient number, since it is larger than the sum of its proper divisors (2604131).

231791869 is a wasteful number, since it uses less digits than its factorization.

231791869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131.

The product of its digits is 163296, while the sum is 46.

The square root of 231791869 is about 15224.7124439183. The cubic root of 231791869 is about 614.2795617788.

It can be divided in two parts, 231 and 791869, that added together give a square (792100 = 890²).

The spelling of 231791869 in words is "two hundred thirty-one million, seven hundred ninety-one thousand, eight hundred sixty-nine".