33975729 has 6 divisors (see below), whose sum is σ = 49076066. Its totient is φ = 22650480.

The previous prime is 33975679. The next prime is 33975749. The reversal of 33975729 is 92757933.

It can be written as a sum of positive squares in only one way, i.e., 31945104 + 2030625 = 5652^2 + 1425^2 .

It is not a de Polignac number, because 33975729 - 2²¹ = 31878577 is a prime.

It is a super-2 number, since 2×33975729² = 2308700322162882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33975749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1887532 + ... + 1887549.

Almost surely, 2^33975729 is an apocalyptic number.

It is an amenable number.

33975729 is a deficient number, since it is larger than the sum of its proper divisors (15100337).

33975729 is a wasteful number, since it uses less digits than its factorization.

33975729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775087 (or 3775084 counting only the distinct ones).

The product of its digits is 357210, while the sum is 45.

The square root of 33975729 is about 5828.8703022112. The cubic root of 33975729 is about 323.8840748972.

The spelling of 33975729 in words is "thirty-three million, nine hundred seventy-five thousand, seven hundred twenty-nine".