33487973 has 2 divisors, whose sum is σ = 33487974. Its totient is φ = 33487972.

The previous prime is 33487969. The next prime is 33487999. The reversal of 33487973 is 37978433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33373729 + 114244 = 5777^2 + 338^2 .

It is an emirp because it is prime and its reverse (37978433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33487973 - 2² = 33487969 is a prime.

It is a super-2 number, since 2×33487973² = 2242888671297458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33487903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16743986 + 16743987.

It is an arithmetic number, because the mean of its divisors is an integer number (16743987).

Almost surely, 2^33487973 is an apocalyptic number.

It is an amenable number.

33487973 is a deficient number, since it is larger than the sum of its proper divisors (1).

33487973 is an equidigital number, since it uses as much as digits as its factorization.

33487973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 44.

The square root of 33487973 is about 5786.8793835711. The cubic root of 33487973 is about 322.3267037627.

The spelling of 33487973 in words is "thirty-three million, four hundred eighty-seven thousand, nine hundred seventy-three".