210873394 has 4 divisors (see below), whose sum is σ = 316310094. Its totient is φ = 105436696.

The previous prime is 210873391. The next prime is 210873409. The reversal of 210873394 is 493378012.

210873394 is digitally balanced in base 3, 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., 138368169 + 72505225 = 11763^2 + 8515^2 .

It is not an unprimeable number, because it can be changed into a prime (210873391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52718347 + ... + 52718350.

Almost surely, 2^210873394 is an apocalyptic number.

210873394 is a deficient number, since it is larger than the sum of its proper divisors (105436700).

210873394 is a wasteful number, since it uses less digits than its factorization.

210873394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105436699.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 210873394 is about 14521.4804341706. The cubic root of 210873394 is about 595.2150850111.

The spelling of 210873394 in words is "two hundred ten million, eight hundred seventy-three thousand, three hundred ninety-four".