85637459 has 2 divisors, whose sum is σ = 85637460. Its totient is φ = 85637458.

The previous prime is 85637417. The next prime is 85637471. The reversal of 85637459 is 95473658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85637459 - 2¹² = 85633363 is a prime.

It is not a weakly prime, because it can be changed into another prime (85637759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42818729 + 42818730.

It is an arithmetic number, because the mean of its divisors is an integer number (42818730).

Almost surely, 2^85637459 is an apocalyptic number.

85637459 is a deficient number, since it is larger than the sum of its proper divisors (1).

85637459 is an equidigital number, since it uses as much as digits as its factorization.

85637459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 85637459 is about 9254.0509507999. The cubic root of 85637459 is about 440.7793676656.

The spelling of 85637459 in words is "eighty-five million, six hundred thirty-seven thousand, four hundred fifty-nine".