7813394 has 4 divisors (see below), whose sum is σ = 11720094. Its totient is φ = 3906696.

The previous prime is 7813369. The next prime is 7813397. The reversal of 7813394 is 4933187.

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., 7812025 + 1369 = 2795^2 + 37^2 .

It is a super-2 number, since 2×7813394² = 122098251598472, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7813397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953347 + ... + 1953350.

Almost surely, 2^7813394 is an apocalyptic number.

7813394 is a deficient number, since it is larger than the sum of its proper divisors (3906700).

7813394 is a wasteful number, since it uses less digits than its factorization.

7813394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906699.

The product of its digits is 18144, while the sum is 35.

The square root of 7813394 is about 2795.2448908817. The cubic root of 7813394 is about 198.4326999356.

The spelling of 7813394 in words is "seven million, eight hundred thirteen thousand, three hundred ninety-four".