213998093 has 8 divisors (see below), whose sum is σ = 216475416. Its totient is φ = 211528000.

The previous prime is 213998087. The next prime is 213998101. The reversal of 213998093 is 390899312.

It can be written as a sum of positive squares in 4 ways, for example, as 20593444 + 193404649 = 4538^2 + 13907^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213998093 - 2⁴ = 213998077 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 (213998293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76703 + ... + 79443.

It is an arithmetic number, because the mean of its divisors is an integer number (27059427).

Almost surely, 2^213998093 is an apocalyptic number.

It is an amenable number.

213998093 is a deficient number, since it is larger than the sum of its proper divisors (2477323).

213998093 is a wasteful number, since it uses less digits than its factorization.

213998093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 213998093 is about 14628.6736582644. The cubic root of 213998093 is about 598.1406262416.

It can be divided in two parts, 21399 and 8093, that added together give a palindrome (29492).

The spelling of 213998093 in words is "two hundred thirteen million, nine hundred ninety-eight thousand, ninety-three".