33979421 has 4 divisors (see below), whose sum is σ = 38833632. Its totient is φ = 29125212.

The previous prime is 33979409. The next prime is 33979433. The reversal of 33979421 is 12497933.

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: 12497933 = 7 ⋅1785419.

It is an interprime number because it is at equal distance from previous prime (33979409) and next prime (33979433).

It is a cyclic number.

It is not a de Polignac number, because 33979421 - 2¹⁰ = 33978397 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 (33979471) 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, 2427095 + ... + 2427108.

It is an arithmetic number, because the mean of its divisors is an integer number (9708408).

Almost surely, 2^33979421 is an apocalyptic number.

It is an amenable number.

33979421 is a deficient number, since it is larger than the sum of its proper divisors (4854211).

33979421 is an equidigital number, since it uses as much as digits as its factorization.

33979421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4854210.

The product of its digits is 40824, while the sum is 38.

The square root of 33979421 is about 5829.1869930549. The cubic root of 33979421 is about 323.8958061803.

The spelling of 33979421 in words is "thirty-three million, nine hundred seventy-nine thousand, four hundred twenty-one".