33981969 has 8 divisors (see below), whose sum is σ = 51782080. Its totient is φ = 19418256.

The previous prime is 33981953. The next prime is 33981973. The reversal of 33981969 is 96918933.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33981969 - 2⁴ = 33981953 is a prime.

It is a super-2 number, since 2×33981969² = 2309548434233922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33981919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809074 + ... + 809115.

It is an arithmetic number, because the mean of its divisors is an integer number (6472760).

Almost surely, 2^33981969 is an apocalyptic number.

It is an amenable number.

33981969 is a deficient number, since it is larger than the sum of its proper divisors (17800111).

33981969 is a wasteful number, since it uses less digits than its factorization.

33981969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618199.

The product of its digits is 314928, while the sum is 48.

The square root of 33981969 is about 5829.4055443072. The cubic root of 33981969 is about 323.9039019224.

The spelling of 33981969 in words is "thirty-three million, nine hundred eighty-one thousand, nine hundred sixty-nine".