32687561 has 2 divisors, whose sum is σ = 32687562. Its totient is φ = 32687560.

The previous prime is 32687509. The next prime is 32687569. The reversal of 32687561 is 16578623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31990336 + 697225 = 5656^2 + 835^2 .

It is an emirp because it is prime and its reverse (16578623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32687561 - 2¹⁸ = 32425417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (32687569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16343780 + 16343781.

It is an arithmetic number, because the mean of its divisors is an integer number (16343781).

Almost surely, 2^32687561 is an apocalyptic number.

It is an amenable number.

32687561 is a deficient number, since it is larger than the sum of its proper divisors (1).

32687561 is an equidigital number, since it uses as much as digits as its factorization.

32687561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 32687561 is about 5717.3036476997. The cubic root of 32687561 is about 319.7379397443.

The spelling of 32687561 in words is "thirty-two million, six hundred eighty-seven thousand, five hundred sixty-one".