213894658 has 4 divisors (see below), whose sum is σ = 320841990. Its totient is φ = 106947328.

The previous prime is 213894643. The next prime is 213894661. The reversal of 213894658 is 856498312.

213894658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 186677569 + 27217089 = 13663^2 + 5217^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53473663 + ... + 53473666.

Almost surely, 2^213894658 is an apocalyptic number.

213894658 is a deficient number, since it is larger than the sum of its proper divisors (106947332).

213894658 is a wasteful number, since it uses less digits than its factorization.

213894658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106947331.

The product of its digits is 414720, while the sum is 46.

The square root of 213894658 is about 14625.1378796919. The cubic root of 213894658 is about 598.0442411984.

The spelling of 213894658 in words is "two hundred thirteen million, eight hundred ninety-four thousand, six hundred fifty-eight".