234097981 has 4 divisors (see below), whose sum is σ = 252105532. Its totient is φ = 216090432.

The previous prime is 234097967. The next prime is 234097991. The reversal of 234097981 is 189790432.

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 151905625 + 82192356 = 12325^2 + 9066^2 .

It is a cyclic number.

It is not a de Polignac number, because 234097981 - 2¹³ = 234089789 is a prime.

It is a super-2 number, since 2×234097981² = 109603729416552722, 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 (234097961) 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, 9003756 + ... + 9003781.

It is an arithmetic number, because the mean of its divisors is an integer number (63026383).

Almost surely, 2^234097981 is an apocalyptic number.

It is an amenable number.

234097981 is a deficient number, since it is larger than the sum of its proper divisors (18007551).

234097981 is a wasteful number, since it uses less digits than its factorization.

234097981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18007550.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 234097981 is about 15300.2608147704. The cubic root of 234097981 is about 616.3100116694.

The spelling of 234097981 in words is "two hundred thirty-four million, ninety-seven thousand, nine hundred eighty-one".