33972839 has 2 divisors, whose sum is σ = 33972840. Its totient is φ = 33972838.

The previous prime is 33972803. The next prime is 33972853. The reversal of 33972839 is 93827933.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 33972839 - 2⁸ = 33972583 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33972839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33972859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16986419 + 16986420.

It is an arithmetic number, because the mean of its divisors is an integer number (16986420).

Almost surely, 2^33972839 is an apocalyptic number.

33972839 is a deficient number, since it is larger than the sum of its proper divisors (1).

33972839 is an equidigital number, since it uses as much as digits as its factorization.

33972839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 33972839 is about 5828.6223929845. The cubic root of 33972839 is about 323.8748913658.

The spelling of 33972839 in words is "thirty-three million, nine hundred seventy-two thousand, eight hundred thirty-nine".