235853008609 has 3 divisors (see below), whose sum is σ = 235853494257. Its totient is φ = 235852522962.

The previous prime is 235853008591. The next prime is 235853008619. The reversal of 235853008609 is 906800358532.

The square root of 235853008609 is 485647.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 235853008609 - 2¹⁷ = 235852877537 is a prime.

It is a super-2 number, since 2×235853008609² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (235853008619) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 242824 + ... + 728470.

It is an arithmetic number, because the mean of its divisors is an integer number (78617831419).

Almost surely, 2^235853008609 is an apocalyptic number.

235853008609 is the 485647-th square number.

235853008609 is the 242824-th centered octagonal number.

It is an amenable number.

235853008609 is a deficient number, since it is larger than the sum of its proper divisors (485648).

235853008609 is an frugal number, since it uses more digits than its factorization.

235853008609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971294 (or 485647 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

Multiplying 235853008609 by its sum of digits (49), we get a square (11556797421841 = 3399529²).

The spelling of 235853008609 in words is "two hundred thirty-five billion, eight hundred fifty-three million, eight thousand, six hundred nine".