33447994 has 4 divisors (see below), whose sum is σ = 50171994. Its totient is φ = 16723996.

The previous prime is 33447989. The next prime is 33448007. The reversal of 33447994 is 49974433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49974433 = 61 ⋅819253.

It can be written as a sum of positive squares in only one way, i.e., 32661225 + 786769 = 5715^2 + 887^2 .

It is a super-2 number, since 2×33447994² = 2237536605248072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33447994.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361997 + ... + 8362000.

Almost surely, 2^33447994 is an apocalyptic number.

33447994 is a deficient number, since it is larger than the sum of its proper divisors (16724000).

33447994 is a wasteful number, since it uses less digits than its factorization.

33447994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16723999.

The product of its digits is 326592, while the sum is 43.

The square root of 33447994 is about 5783.4240722949. The cubic root of 33447994 is about 322.1983847518.

The spelling of 33447994 in words is "thirty-three million, four hundred forty-seven thousand, nine hundred ninety-four".