214743993 has 4 divisors (see below), whose sum is σ = 286325328. Its totient is φ = 143162660.

The previous prime is 214743989. The next prime is 214744003. The reversal of 214743993 is 399347412.

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 not a de Polignac number, because 214743993 - 2² = 214743989 is a prime.

It is a super-2 number, since 2×214743993² = 92229965059168098, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (214743943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35790663 + ... + 35790668.

It is an arithmetic number, because the mean of its divisors is an integer number (71581332).

Almost surely, 2^214743993 is an apocalyptic number.

It is an amenable number.

214743993 is a deficient number, since it is larger than the sum of its proper divisors (71581335).

214743993 is an equidigital number, since it uses as much as digits as its factorization.

214743993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71581334.

The product of its digits is 163296, while the sum is 42.

The square root of 214743993 is about 14654.1459321245. The cubic root of 214743993 is about 598.8347690820.

The spelling of 214743993 in words is "two hundred fourteen million, seven hundred forty-three thousand, nine hundred ninety-three".