87773317 has 2 divisors, whose sum is σ = 87773318. Its totient is φ = 87773316.

The previous prime is 87773311. The next prime is 87773339. The reversal of 87773317 is 71337778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86007076 + 1766241 = 9274^2 + 1329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87773317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87773311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43886658 + 43886659.

It is an arithmetic number, because the mean of its divisors is an integer number (43886659).

Almost surely, 2^87773317 is an apocalyptic number.

It is an amenable number.

87773317 is a deficient number, since it is larger than the sum of its proper divisors (1).

87773317 is an equidigital number, since it uses as much as digits as its factorization.

87773317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172872, while the sum is 43.

The square root of 87773317 is about 9368.7414843190. The cubic root of 87773317 is about 444.4137666163.

The spelling of 87773317 in words is "eighty-seven million, seven hundred seventy-three thousand, three hundred seventeen".