33939397 has 4 divisors (see below), whose sum is σ = 34856716. Its totient is φ = 33022080.

The previous prime is 33939391. The next prime is 33939407. The reversal of 33939397 is 79393933.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79393933 = 877 ⋅90529.

It can be written as a sum of positive squares in 2 ways, for example, as 17690436 + 16248961 = 4206^2 + 4031^2 .

It is a cyclic number.

It is not a de Polignac number, because 33939397 - 2¹¹ = 33937349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33939391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458604 + ... + 458677.

It is an arithmetic number, because the mean of its divisors is an integer number (8714179).

Almost surely, 2^33939397 is an apocalyptic number.

33939397 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

33939397 is the 3364-th hex number.

It is an amenable number.

33939397 is a deficient number, since it is larger than the sum of its proper divisors (917319).

33939397 is an equidigital number, since it uses as much as digits as its factorization.

33939397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917318.

The product of its digits is 413343, while the sum is 46.

The square root of 33939397 is about 5825.7529127144. The cubic root of 33939397 is about 323.7685850702.

The spelling of 33939397 in words is "thirty-three million, nine hundred thirty-nine thousand, three hundred ninety-seven".