33979381 has 2 divisors, whose sum is σ = 33979382. Its totient is φ = 33979380.

The previous prime is 33979367. The next prime is 33979397. The reversal of 33979381 is 18397933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25908100 + 8071281 = 5090^2 + 2841^2 .

It is an emirp because it is prime and its reverse (18397933) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33979381 - 2¹⁵ = 33946613 is a prime.

It is a super-2 number, since 2×33979381² = 2309196666286322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33979081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16989690 + 16989691.

It is an arithmetic number, because the mean of its divisors is an integer number (16989691).

Almost surely, 2^33979381 is an apocalyptic number.

It is an amenable number.

33979381 is a deficient number, since it is larger than the sum of its proper divisors (1).

33979381 is an equidigital number, since it uses as much as digits as its factorization.

33979381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 33979381 is about 5829.1835620437. The cubic root of 33979381 is about 323.8956790854.

The spelling of 33979381 in words is "thirty-three million, nine hundred seventy-nine thousand, three hundred eighty-one".