85218737 has 2 divisors, whose sum is σ = 85218738. Its totient is φ = 85218736.

The previous prime is 85218709. The next prime is 85218761. The reversal of 85218737 is 73781258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68046001 + 17172736 = 8249^2 + 4144^2 .

It is a cyclic number.

It is not a de Polignac number, because 85218737 - 2⁸ = 85218481 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85218694 and 85218703.

It is not a weakly prime, because it can be changed into another prime (85218137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42609368 + 42609369.

It is an arithmetic number, because the mean of its divisors is an integer number (42609369).

Almost surely, 2^85218737 is an apocalyptic number.

It is an amenable number.

85218737 is a deficient number, since it is larger than the sum of its proper divisors (1).

85218737 is an equidigital number, since it uses as much as digits as its factorization.

85218737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 41.

The square root of 85218737 is about 9231.3995146998. The cubic root of 85218737 is about 440.0598007564.

The spelling of 85218737 in words is "eighty-five million, two hundred eighteen thousand, seven hundred thirty-seven".