43813394 has 4 divisors (see below), whose sum is σ = 65720094. Its totient is φ = 21906696.

The previous prime is 43813387. The next prime is 43813417. The reversal of 43813394 is 49331834.

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., 28890625 + 14922769 = 5375^2 + 3863^2 .

It is a super-2 number, since 2×43813394² = 3839226987598472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10953347 + ... + 10953350.

Almost surely, 2^43813394 is an apocalyptic number.

43813394 is a deficient number, since it is larger than the sum of its proper divisors (21906700).

43813394 is a wasteful number, since it uses less digits than its factorization.

43813394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21906699.

The product of its digits is 31104, while the sum is 35.

The square root of 43813394 is about 6619.1686789203. The cubic root of 43813394 is about 352.5350474014.

The spelling of 43813394 in words is "forty-three million, eight hundred thirteen thousand, three hundred ninety-four".