233986649 has 4 divisors (see below), whose sum is σ = 251985636. Its totient is φ = 215987664.

The previous prime is 233986603. The next prime is 233986661. The reversal of 233986649 is 946689332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129231424 + 104755225 = 11368^2 + 10235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233986649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233986597 and 233986606.

It is not an unprimeable number, because it can be changed into a prime (233986699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8999474 + ... + 8999499.

It is an arithmetic number, because the mean of its divisors is an integer number (62996409).

Almost surely, 2^233986649 is an apocalyptic number.

It is an amenable number.

233986649 is a deficient number, since it is larger than the sum of its proper divisors (17998987).

233986649 is a wasteful number, since it uses less digits than its factorization.

233986649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17998986.

The product of its digits is 1679616, while the sum is 50.

The square root of 233986649 is about 15296.6221434668. The cubic root of 233986649 is about 616.2122948842.

It can be divided in two parts, 2339 and 86649, that added together give a palindrome (88988).

The spelling of 233986649 in words is "two hundred thirty-three million, nine hundred eighty-six thousand, six hundred forty-nine".