33979147 has 2 divisors, whose sum is σ = 33979148. Its totient is φ = 33979146.

The previous prime is 33979139. The next prime is 33979177. The reversal of 33979147 is 74197933.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33979147 - 2³ = 33979139 is a prime.

It is not a weakly prime, because it can be changed into another prime (33979177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16989573 + 16989574.

It is an arithmetic number, because the mean of its divisors is an integer number (16989574).

Almost surely, 2^33979147 is an apocalyptic number.

33979147 is a deficient number, since it is larger than the sum of its proper divisors (1).

33979147 is an equidigital number, since it uses as much as digits as its factorization.

33979147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 43.

The square root of 33979147 is about 5829.1634905877. The cubic root of 33979147 is about 323.8949355780.

It can be divided in two parts, 3397 and 9147, that added together give a square (12544 = 112²).

The spelling of 33979147 in words is "thirty-three million, nine hundred seventy-nine thousand, one hundred forty-seven".