235909421 has 4 divisors (see below), whose sum is σ = 257355744. Its totient is φ = 214463100.

The previous prime is 235909409. The next prime is 235909423. The reversal of 235909421 is 124909532.

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 a de Polignac number, because none of the positive numbers 2^k-235909421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235909423) 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, 10723145 + ... + 10723166.

It is an arithmetic number, because the mean of its divisors is an integer number (64338936).

Almost surely, 2^235909421 is an apocalyptic number.

It is an amenable number.

235909421 is a deficient number, since it is larger than the sum of its proper divisors (21446323).

235909421 is a wasteful number, since it uses less digits than its factorization.

235909421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21446322.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 235909421 is about 15359.3431174644. The cubic root of 235909421 is about 617.8955889911.

The spelling of 235909421 in words is "two hundred thirty-five million, nine hundred nine thousand, four hundred twenty-one".