33401997 has 24 divisors (see below), whose sum is σ = 51284480. Its totient is φ = 21485520.

The previous prime is 33401993. The next prime is 33402001. The reversal of 33401997 is 79910433.

It is an interprime number because it is at equal distance from previous prime (33401993) and next prime (33402001).

It is not a de Polignac number, because 33401997 - 2² = 33401993 is a prime.

It is a super-2 number, since 2×33401997² = 2231386807176018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33401993) 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, 21972 + ... + 23442.

Almost surely, 2^33401997 is an apocalyptic number.

It is an amenable number.

33401997 is a deficient number, since it is larger than the sum of its proper divisors (17882483).

33401997 is a wasteful number, since it uses less digits than its factorization.

33401997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538 (or 1503 counting only the distinct ones).

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

The square root of 33401997 is about 5779.4460807243. The cubic root of 33401997 is about 322.0506234465.

The spelling of 33401997 in words is "thirty-three million, four hundred one thousand, nine hundred ninety-seven".