85197129 has 16 divisors (see below), whose sum is σ = 120776832. Its totient is φ = 53301248.

The previous prime is 85197127. The next prime is 85197163. The reversal of 85197129 is 92179158.

It is a cyclic number.

It is not a de Polignac number, because 85197129 - 2¹ = 85197127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85197127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7992 + ... + 15305.

It is an arithmetic number, because the mean of its divisors is an integer number (7548552).

Almost surely, 2^85197129 is an apocalyptic number.

It is an amenable number.

85197129 is a deficient number, since it is larger than the sum of its proper divisors (35579703).

85197129 is a wasteful number, since it uses less digits than its factorization.

85197129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23376.

The product of its digits is 45360, while the sum is 42.

The square root of 85197129 is about 9230.2290870812. The cubic root of 85197129 is about 440.0226038663.

The spelling of 85197129 in words is "eighty-five million, one hundred ninety-seven thousand, one hundred twenty-nine".