234036781 has 4 divisors (see below), whose sum is σ = 255312864. Its totient is φ = 212760700.

The previous prime is 234036749. The next prime is 234036791. The reversal of 234036781 is 187630432.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 234036781 - 2⁵ = 234036749 is a prime.

It is a super-2 number, since 2×234036781² = 109546429721683922, 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 (234036721) 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, 10638025 + ... + 10638046.

It is an arithmetic number, because the mean of its divisors is an integer number (63828216).

Almost surely, 2^234036781 is an apocalyptic number.

It is an amenable number.

234036781 is a deficient number, since it is larger than the sum of its proper divisors (21276083).

234036781 is a wasteful number, since it uses less digits than its factorization.

234036781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21276082.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 234036781 is about 15298.2607181339. The cubic root of 234036781 is about 616.2562998861.

The spelling of 234036781 in words is "two hundred thirty-four million, thirty-six thousand, seven hundred eighty-one".