213897941 has 4 divisors (see below), whose sum is σ = 213999084. Its totient is φ = 213796800.

The previous prime is 213897913. The next prime is 213897977. The reversal of 213897941 is 149798312.

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 66178225 + 147719716 = 8135^2 + 12154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213897941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213897892 and 213897901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213897841) 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, 47330 + ... + 51651.

It is an arithmetic number, because the mean of its divisors is an integer number (53499771).

Almost surely, 2^213897941 is an apocalyptic number.

It is an amenable number.

213897941 is a deficient number, since it is larger than the sum of its proper divisors (101143).

213897941 is an equidigital number, since it uses as much as digits as its factorization.

213897941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101142.

The product of its digits is 108864, while the sum is 44.

The square root of 213897941 is about 14625.2501175194. The cubic root of 213897941 is about 598.0473009120.

The spelling of 213897941 in words is "two hundred thirteen million, eight hundred ninety-seven thousand, nine hundred forty-one".