33749397 has 12 divisors (see below), whose sum is σ = 53181024. Its totient is φ = 20454120.

The previous prime is 33749389. The next prime is 33749407. The reversal of 33749397 is 79394733.

It is not a de Polignac number, because 33749397 - 2³ = 33749389 is a prime.

It is a super-2 number, since 2×33749397² = 2278043595727218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33749327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170353 + ... + 170550.

It is an arithmetic number, because the mean of its divisors is an integer number (4431752).

Almost surely, 2^33749397 is an apocalyptic number.

It is an amenable number.

33749397 is a deficient number, since it is larger than the sum of its proper divisors (19431627).

33749397 is a wasteful number, since it uses less digits than its factorization.

33749397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340920 (or 340917 counting only the distinct ones).

The product of its digits is 428652, while the sum is 45.

The square root of 33749397 is about 5809.4231211025. The cubic root of 33749397 is about 323.1632788650.

The spelling of 33749397 in words is "thirty-three million, seven hundred forty-nine thousand, three hundred ninety-seven".