85684507 has 2 divisors, whose sum is σ = 85684508. Its totient is φ = 85684506.

The previous prime is 85684493. The next prime is 85684519. The reversal of 85684507 is 70548658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85684507 - 2¹¹ = 85682459 is a prime.

It is not a weakly prime, because it can be changed into another prime (85684597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42842253 + 42842254.

It is an arithmetic number, because the mean of its divisors is an integer number (42842254).

Almost surely, 2^85684507 is an apocalyptic number.

85684507 is a deficient number, since it is larger than the sum of its proper divisors (1).

85684507 is an equidigital number, since it uses as much as digits as its factorization.

85684507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 85684507 is about 9256.5926236386. The cubic root of 85684507 is about 440.8600721899.

The spelling of 85684507 in words is "eighty-five million, six hundred eighty-four thousand, five hundred seven".