85390129 has 4 divisors (see below), whose sum is σ = 93152880. Its totient is φ = 77627380.

The previous prime is 85390121. The next prime is 85390139. The reversal of 85390129 is 92109358.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85390129 - 2³ = 85390121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85390121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3881359 + ... + 3881380.

It is an arithmetic number, because the mean of its divisors is an integer number (23288220).

Almost surely, 2^85390129 is an apocalyptic number.

It is an amenable number.

85390129 is a deficient number, since it is larger than the sum of its proper divisors (7762751).

85390129 is a wasteful number, since it uses less digits than its factorization.

85390129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7762750.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 85390129 is about 9240.6779513194. The cubic root of 85390129 is about 440.3546194196.

The spelling of 85390129 in words is "eighty-five million, three hundred ninety thousand, one hundred twenty-nine".