233943993 has 6 divisors (see below), whose sum is σ = 337919114. Its totient is φ = 155962656.

The previous prime is 233943989. The next prime is 233944019. The reversal of 233943993 is 399349332.

It can be written as a sum of positive squares in only one way, i.e., 184199184 + 49744809 = 13572^2 + 7053^2 .

It is not a de Polignac number, because 233943993 - 2² = 233943989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233943923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12996880 + ... + 12996897.

Almost surely, 2^233943993 is an apocalyptic number.

It is an amenable number.

233943993 is a deficient number, since it is larger than the sum of its proper divisors (103975121).

233943993 is a wasteful number, since it uses less digits than its factorization.

233943993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25993783 (or 25993780 counting only the distinct ones).

The product of its digits is 472392, while the sum is 45.

The square root of 233943993 is about 15295.2277851623. The cubic root of 233943993 is about 616.1748472361.

The spelling of 233943993 in words is "two hundred thirty-three million, nine hundred forty-three thousand, nine hundred ninety-three".