235706981 has 4 divisors (see below), whose sum is σ = 243310464. Its totient is φ = 228103500.

The previous prime is 235706971. The next prime is 235707001. The reversal of 235706981 is 189607532.

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 235706981 - 2²⁶ = 168598117 is a prime.

It is a super-2 number, since 2×235706981² = 111115561784268722, 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 (235706971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3801695 + ... + 3801756.

It is an arithmetic number, because the mean of its divisors is an integer number (60827616).

Almost surely, 2^235706981 is an apocalyptic number.

It is an amenable number.

235706981 is a deficient number, since it is larger than the sum of its proper divisors (7603483).

235706981 is an equidigital number, since it uses as much as digits as its factorization.

235706981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603482.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 235706981 is about 15352.7515774860. The cubic root of 235706981 is about 617.7187943275.

The spelling of 235706981 in words is "two hundred thirty-five million, seven hundred six thousand, nine hundred eighty-one".