33970813 has 4 divisors (see below), whose sum is σ = 33987708. Its totient is φ = 33953920.

The previous prime is 33970787. The next prime is 33970883. The reversal of 33970813 is 31807933.

33970813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21874329 + 12096484 = 4677^2 + 3478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33970813 is a prime.

It is a super-2 number, since 2×33970813² = 2308032271761938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33970883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4948 + ... + 9613.

It is an arithmetic number, because the mean of its divisors is an integer number (8496927).

Almost surely, 2^33970813 is an apocalyptic number.

It is an amenable number.

33970813 is a deficient number, since it is larger than the sum of its proper divisors (16895).

33970813 is a wasteful number, since it uses less digits than its factorization.

33970813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16894.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 33970813 is about 5828.4485928933. The cubic root of 33970813 is about 323.8684530502.

The spelling of 33970813 in words is "thirty-three million, nine hundred seventy thousand, eight hundred thirteen".