85431667 has 2 divisors, whose sum is σ = 85431668. Its totient is φ = 85431666.

The previous prime is 85431649. The next prime is 85431719. The reversal of 85431667 is 76613458.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85431667 - 2¹⁵ = 85398899 is a prime.

It is not a weakly prime, because it can be changed into another prime (85431607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42715833 + 42715834.

It is an arithmetic number, because the mean of its divisors is an integer number (42715834).

Almost surely, 2^85431667 is an apocalyptic number.

85431667 is a deficient number, since it is larger than the sum of its proper divisors (1).

85431667 is an equidigital number, since it uses as much as digits as its factorization.

85431667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 85431667 is about 9242.9252404204. The cubic root of 85431667 is about 440.4260112976.

The spelling of 85431667 in words is "eighty-five million, four hundred thirty-one thousand, six hundred sixty-seven".