87647233 has 2 divisors, whose sum is σ = 87647234. Its totient is φ = 87647232.

The previous prime is 87647221. The next prime is 87647243. The reversal of 87647233 is 33274678.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84217329 + 3429904 = 9177^2 + 1852^2 .

It is a cyclic number.

It is not a de Polignac number, because 87647233 - 2¹⁷ = 87516161 is a prime.

It is not a weakly prime, because it can be changed into another prime (87647243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43823616 + 43823617.

It is an arithmetic number, because the mean of its divisors is an integer number (43823617).

Almost surely, 2^87647233 is an apocalyptic number.

It is an amenable number.

87647233 is a deficient number, since it is larger than the sum of its proper divisors (1).

87647233 is an equidigital number, since it uses as much as digits as its factorization.

87647233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The square root of 87647233 is about 9362.0100939916. The cubic root of 87647233 is about 444.2008685174.

The spelling of 87647233 in words is "eighty-seven million, six hundred forty-seven thousand, two hundred thirty-three".