234640981 has 8 divisors (see below), whose sum is σ = 243140480. Its totient is φ = 226279872.

The previous prime is 234640961. The next prime is 234640993. The reversal of 234640981 is 189046432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234640981 is a prime.

It is a super-2 number, since 2×234640981² = 110112779929284722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 234640981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234640951) 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 7 ways as a sum of consecutive naturals, for example, 31140 + ... + 37933.

It is an arithmetic number, because the mean of its divisors is an integer number (30392560).

Almost surely, 2^234640981 is an apocalyptic number.

It is an amenable number.

234640981 is a deficient number, since it is larger than the sum of its proper divisors (8499499).

234640981 is an equidigital number, since it uses as much as digits as its factorization.

234640981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69195.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 234640981 is about 15317.9953322881. The cubic root of 234640981 is about 616.7861626071.

The spelling of 234640981 in words is "two hundred thirty-four million, six hundred forty thousand, nine hundred eighty-one".