33997963 has 4 divisors (see below), whose sum is σ = 34639488. Its totient is φ = 33356440.

The previous prime is 33997961. The next prime is 33997981. The reversal of 33997963 is 36979933.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36979933 = 1801 ⋅20533.

It is a cyclic number.

It is not a de Polignac number, because 33997963 - 2¹ = 33997961 is a prime.

It is a super-2 number, since 2×33997963² = 2311722976298738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33997961) 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, 320683 + ... + 320788.

It is an arithmetic number, because the mean of its divisors is an integer number (8659872).

Almost surely, 2^33997963 is an apocalyptic number.

33997963 is a deficient number, since it is larger than the sum of its proper divisors (641525).

33997963 is an equidigital number, since it uses as much as digits as its factorization.

33997963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641524.

The product of its digits is 826686, while the sum is 49.

The square root of 33997963 is about 5830.7772209200. Note that the first 3 decimals coincide. The cubic root of 33997963 is about 323.9547103032.

The spelling of 33997963 in words is "thirty-three million, nine hundred ninety-seven thousand, nine hundred sixty-three".