33979409 has 2 divisors, whose sum is σ = 33979410. Its totient is φ = 33979408.

The previous prime is 33979397. The next prime is 33979433. The reversal of 33979409 is 90497933.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20729809 + 13249600 = 4553^2 + 3640^2 .

It is an emirp because it is prime and its reverse (90497933) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33979409 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33979409.

It is not a weakly prime, because it can be changed into another prime (33979489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16989704 + 16989705.

It is an arithmetic number, because the mean of its divisors is an integer number (16989705).

Almost surely, 2^33979409 is an apocalyptic number.

It is an amenable number.

33979409 is a deficient number, since it is larger than the sum of its proper divisors (1).

33979409 is an equidigital number, since it uses as much as digits as its factorization.

33979409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 33979409 is about 5829.1859637517. The cubic root of 33979409 is about 323.8957680519.

The spelling of 33979409 in words is "thirty-three million, nine hundred seventy-nine thousand, four hundred nine".