32791987 has 2 divisors, whose sum is σ = 32791988. Its totient is φ = 32791986.

The previous prime is 32791981. The next prime is 32791999. The reversal of 32791987 is 78919723.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78919723) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32791987 is a prime.

It is a super-2 number, since 2×32791987² = 2150628822816338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32791981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16395993 + 16395994.

It is an arithmetic number, because the mean of its divisors is an integer number (16395994).

Almost surely, 2^32791987 is an apocalyptic number.

32791987 is a deficient number, since it is larger than the sum of its proper divisors (1).

32791987 is an equidigital number, since it uses as much as digits as its factorization.

32791987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 32791987 is about 5726.4288173346. The cubic root of 32791987 is about 320.0780636372.

The spelling of 32791987 in words is "thirty-two million, seven hundred ninety-one thousand, nine hundred eighty-seven".