33401979 has 24 divisors (see below), whose sum is σ = 52746512. Its totient is φ = 20243520.

The previous prime is 33401969. The next prime is 33401983. The reversal of 33401979 is 97910433.

It is not a de Polignac number, because 33401979 - 2⁵ = 33401947 is a prime.

It is a super-2 number, since 2×33401979² = 2231384402232882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (33401959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5709 + ... + 9969.

Almost surely, 2^33401979 is an apocalyptic number.

33401979 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

33401979 is a deficient number, since it is larger than the sum of its proper divisors (19344533).

33401979 is a wasteful number, since it uses less digits than its factorization.

33401979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347 (or 4344 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 33401979 is about 5779.4445234815. Note that the first 3 decimals coincide. The cubic root of 33401979 is about 322.0505655965.

The spelling of 33401979 in words is "thirty-three million, four hundred one thousand, nine hundred seventy-nine".