33889913 has 4 divisors (see below), whose sum is σ = 34983168. Its totient is φ = 32796660.

The previous prime is 33889909. The next prime is 33889927. The reversal of 33889913 is 31998833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31998833 = 5021 ⋅6373.

It is a cyclic number.

It is not a de Polignac number, because 33889913 - 2² = 33889909 is a prime.

It is a super-2 number, since 2×33889913² = 2297052406295138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33889013) 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, 546581 + ... + 546642.

It is an arithmetic number, because the mean of its divisors is an integer number (8745792).

Almost surely, 2^33889913 is an apocalyptic number.

It is an amenable number.

33889913 is a deficient number, since it is larger than the sum of its proper divisors (1093255).

33889913 is a wasteful number, since it uses less digits than its factorization.

33889913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093254.

The product of its digits is 139968, while the sum is 44.

The square root of 33889913 is about 5821.5043588406. The cubic root of 33889913 is about 323.6111558598.

The spelling of 33889913 in words is "thirty-three million, eight hundred eighty-nine thousand, nine hundred thirteen".