213097894 has 4 divisors (see below), whose sum is σ = 319646844. Its totient is φ = 106548946.

The previous prime is 213097891. The next prime is 213097931. The reversal of 213097894 is 498790312.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 213097894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213097891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53274472 + ... + 53274475.

It is an arithmetic number, because the mean of its divisors is an integer number (79911711).

Almost surely, 2^213097894 is an apocalyptic number.

213097894 is a deficient number, since it is larger than the sum of its proper divisors (106548950).

213097894 is a wasteful number, since it uses less digits than its factorization.

213097894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106548949.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 213097894 is about 14597.8729272453. The cubic root of 213097894 is about 597.3007396811.

The spelling of 213097894 in words is "two hundred thirteen million, ninety-seven thousand, eight hundred ninety-four".