394221098 has 4 divisors (see below), whose sum is σ = 591331650. Its totient is φ = 197110548.

The previous prime is 394221059. The next prime is 394221103. The reversal of 394221098 is 890122493.

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., 314601169 + 79619929 = 17737^2 + 8923^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98555273 + ... + 98555276.

Almost surely, 2^394221098 is an apocalyptic number.

394221098 is a deficient number, since it is larger than the sum of its proper divisors (197110552).

394221098 is a wasteful number, since it uses less digits than its factorization.

394221098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197110551.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 394221098 is about 19855.0018383278. The cubic root of 394221098 is about 733.2407974606.

The spelling of 394221098 in words is "three hundred ninety-four million, two hundred twenty-one thousand, ninety-eight".