234537713621 has 4 divisors (see below), whose sum is σ = 234603952044. Its totient is φ = 234471475200.

The previous prime is 234537713603. The next prime is 234537713653. The reversal of 234537713621 is 126317735432.

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 66180135025 + 168357578596 = 257255^2 + 410314^2 .

It is a cyclic number.

It is not a de Polignac number, because 234537713621 - 2²⁶ = 234470604757 is a prime.

It is a super-2 number, since 2×234537713621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234537713671) 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, 33113900 + ... + 33120981.

It is an arithmetic number, because the mean of its divisors is an integer number (58650988011).

Almost surely, 2^234537713621 is an apocalyptic number.

It is an amenable number.

234537713621 is a deficient number, since it is larger than the sum of its proper divisors (66238423).

234537713621 is an equidigital number, since it uses as much as digits as its factorization.

234537713621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66238422.

The product of its digits is 635040, while the sum is 44.

The spelling of 234537713621 in words is "two hundred thirty-four billion, five hundred thirty-seven million, seven hundred thirteen thousand, six hundred twenty-one".