233138779 has 4 divisors (see below), whose sum is σ = 234486576. Its totient is φ = 231790984.

The previous prime is 233138777. The next prime is 233138827. The reversal of 233138779 is 977831332.

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

It is a cyclic number.

It is not a de Polignac number, because 233138779 - 2¹ = 233138777 is a prime.

It is a super-2 number, since 2×233138779² = 108707380547221682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233138777) 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 3 ways as a sum of consecutive naturals, for example, 673639 + ... + 673984.

It is an arithmetic number, because the mean of its divisors is an integer number (58621644).

Almost surely, 2^233138779 is an apocalyptic number.

233138779 is a deficient number, since it is larger than the sum of its proper divisors (1347797).

233138779 is a wasteful number, since it uses less digits than its factorization.

233138779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347796.

The product of its digits is 190512, while the sum is 43.

The square root of 233138779 is about 15268.8827030664. The cubic root of 233138779 is about 615.4670953001.

The spelling of 233138779 in words is "two hundred thirty-three million, one hundred thirty-eight thousand, seven hundred seventy-nine".