85609031 has 8 divisors (see below), whose sum is σ = 87220224. Its totient is φ = 84009240.

The previous prime is 85609021. The next prime is 85609037. The reversal of 85609031 is 13090658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85609031 - 2¹⁸ = 85346887 is a prime.

It is a super-2 number, since 2×85609031² = 14657812377517922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85609037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13130 + ... + 18536.

It is an arithmetic number, because the mean of its divisors is an integer number (10902528).

Almost surely, 2^85609031 is an apocalyptic number.

85609031 is a deficient number, since it is larger than the sum of its proper divisors (1611193).

85609031 is a wasteful number, since it uses less digits than its factorization.

85609031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5701.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 85609031 is about 9252.5148473266. The cubic root of 85609031 is about 440.7305889232.

Adding to 85609031 its reverse (13090658), we get a palindrome (98699689).

The spelling of 85609031 in words is "eighty-five million, six hundred nine thousand, thirty-one".