33479987 has 4 divisors (see below), whose sum is σ = 35449416. Its totient is φ = 31510560.

The previous prime is 33479983. The next prime is 33479989. The reversal of 33479987 is 78997433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78997433 = 23 ⋅3434671.

It is a cyclic number.

It is not a de Polignac number, because 33479987 - 2² = 33479983 is a prime.

It is a super-2 number, since 2×33479987² = 2241819059040338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33479983) 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, 984689 + ... + 984722.

It is an arithmetic number, because the mean of its divisors is an integer number (8862354).

Almost surely, 2^33479987 is an apocalyptic number.

33479987 is a deficient number, since it is larger than the sum of its proper divisors (1969429).

33479987 is a wasteful number, since it uses less digits than its factorization.

33479987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969428.

The product of its digits is 1143072, while the sum is 50.

The square root of 33479987 is about 5786.1893332313. The cubic root of 33479987 is about 322.3010795811.

The spelling of 33479987 in words is "thirty-three million, four hundred seventy-nine thousand, nine hundred eighty-seven".