8213938 has 4 divisors (see below), whose sum is σ = 12320910. Its totient is φ = 4106968.

The previous prime is 8213897. The next prime is 8213951. The reversal of 8213938 is 8393128.

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., 4765489 + 3448449 = 2183^2 + 1857^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2053483 + ... + 2053486.

Almost surely, 2^8213938 is an apocalyptic number.

8213938 is a deficient number, since it is larger than the sum of its proper divisors (4106972).

8213938 is a wasteful number, since it uses less digits than its factorization.

8213938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106971.

The product of its digits is 10368, while the sum is 34.

The square root of 8213938 is about 2865.9968597331. The cubic root of 8213938 is about 201.7671564688.

The spelling of 8213938 in words is "eight million, two hundred thirteen thousand, nine hundred thirty-eight".