87187937 has 2 divisors, whose sum is σ = 87187938. Its totient is φ = 87187936.

The previous prime is 87187921. The next prime is 87187939. The reversal of 87187937 is 73978178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73342096 + 13845841 = 8564^2 + 3721^2 .

It is a cyclic number.

It is not a de Polignac number, because 87187937 - 2⁴ = 87187921 is a prime.

Together with 87187939, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87187939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43593968 + 43593969.

It is an arithmetic number, because the mean of its divisors is an integer number (43593969).

Almost surely, 2^87187937 is an apocalyptic number.

It is an amenable number.

87187937 is a deficient number, since it is larger than the sum of its proper divisors (1).

87187937 is an equidigital number, since it uses as much as digits as its factorization.

87187937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 50.

The square root of 87187937 is about 9337.4480989187. The cubic root of 87187937 is about 443.4235969876.

The spelling of 87187937 in words is "eighty-seven million, one hundred eighty-seven thousand, nine hundred thirty-seven".