2237813993 has 4 divisors (see below), whose sum is σ = 2250749508. Its totient is φ = 2224878480.

The previous prime is 2237813987. The next prime is 2237814001. The reversal of 2237813993 is 3993187322.

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 1785316009 + 452497984 = 42253^2 + 21272^2 .

It is a cyclic number.

It is not a de Polignac number, because 2237813993 - 2⁸ = 2237813737 is a prime.

It is a super-2 number, since 2×2237813993² = 10015622934533208098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2237813923) 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, 6467498 + ... + 6467843.

It is an arithmetic number, because the mean of its divisors is an integer number (562687377).

Almost surely, 2^2237813993 is an apocalyptic number.

It is an amenable number.

2237813993 is a deficient number, since it is larger than the sum of its proper divisors (12935515).

2237813993 is a wasteful number, since it uses less digits than its factorization.

2237813993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12935514.

The product of its digits is 489888, while the sum is 47.

The square root of 2237813993 is about 47305.5387137701. The cubic root of 2237813993 is about 1308.0007561477. Note that the first 3 decimals are identical.

The spelling of 2237813993 in words is "two billion, two hundred thirty-seven million, eight hundred thirteen thousand, nine hundred ninety-three".