87531611 has 2 divisors, whose sum is σ = 87531612. Its totient is φ = 87531610.

The previous prime is 87531601. The next prime is 87531649. The reversal of 87531611 is 11613578.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87531611 - 2²² = 83337307 is a prime.

It is not a weakly prime, because it can be changed into another prime (87531601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43765805 + 43765806.

It is an arithmetic number, because the mean of its divisors is an integer number (43765806).

Almost surely, 2^87531611 is an apocalyptic number.

87531611 is a deficient number, since it is larger than the sum of its proper divisors (1).

87531611 is an equidigital number, since it uses as much as digits as its factorization.

87531611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 87531611 is about 9355.8329933791. The cubic root of 87531611 is about 444.0054564029.

The spelling of 87531611 in words is "eighty-seven million, five hundred thirty-one thousand, six hundred eleven".