33990993 has 12 divisors (see below), whose sum is σ = 49157940. Its totient is φ = 22633056.

The previous prime is 33990989. The next prime is 33990997. The reversal of 33990993 is 39909933.

It is an interprime number because it is at equal distance from previous prime (33990989) and next prime (33990997).

It can be written as a sum of positive squares in 2 ways, for example, as 22212369 + 11778624 = 4713^2 + 3432^2 .

It is not a de Polignac number, because 33990993 - 2² = 33990989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (33990997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7855 + ... + 11387.

It is an arithmetic number, because the mean of its divisors is an integer number (4096495).

Almost surely, 2^33990993 is an apocalyptic number.

It is an amenable number.

33990993 is a deficient number, since it is larger than the sum of its proper divisors (15166947).

33990993 is a wasteful number, since it uses less digits than its factorization.

33990993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608 (or 4605 counting only the distinct ones).

The product of its (nonzero) digits is 177147, while the sum is 45.

The square root of 33990993 is about 5830.1794998096. The cubic root of 33990993 is about 323.9325705586.

The spelling of 33990993 in words is "thirty-three million, nine hundred ninety thousand, nine hundred ninety-three".