8457213194 has 4 divisors (see below), whose sum is σ = 12685819794. Its totient is φ = 4228606596.

The previous prime is 8457213187. The next prime is 8457213239. The reversal of 8457213194 is 4913127548.

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., 5485327969 + 2971885225 = 74063^2 + 54515^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2114303297 + ... + 2114303300.

Almost surely, 2^8457213194 is an apocalyptic number.

8457213194 is a deficient number, since it is larger than the sum of its proper divisors (4228606600).

8457213194 is a wasteful number, since it uses less digits than its factorization.

8457213194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228606599.

The product of its digits is 241920, while the sum is 44.

The square root of 8457213194 is about 91963.1077878515. The cubic root of 8457213194 is about 2037.3974560609.

The spelling of 8457213194 in words is "eight billion, four hundred fifty-seven million, two hundred thirteen thousand, one hundred ninety-four".