85613999 has 2 divisors, whose sum is σ = 85614000. Its totient is φ = 85613998.

The previous prime is 85613993. The next prime is 85614013. The reversal of 85613999 is 99931658.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85613999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85613993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42806999 + 42807000.

It is an arithmetic number, because the mean of its divisors is an integer number (42807000).

Almost surely, 2^85613999 is an apocalyptic number.

85613999 is a deficient number, since it is larger than the sum of its proper divisors (1).

85613999 is an equidigital number, since it uses as much as digits as its factorization.

85613999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 50.

The square root of 85613999 is about 9252.7833109827. The cubic root of 85613999 is about 440.7391141422.

The spelling of 85613999 in words is "eighty-five million, six hundred thirteen thousand, nine hundred ninety-nine".