85420631 has 8 divisors (see below), whose sum is σ = 93564720. Its totient is φ = 77623168.

The previous prime is 85420627. The next prime is 85420663. The reversal of 85420631 is 13602458.

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 85420631 - 2² = 85420627 is a prime.

It is a super-2 number, since 2×85420631² = 14593368400876322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85420594 and 85420603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85420691) 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, 86141 + ... + 87126.

It is an arithmetic number, because the mean of its divisors is an integer number (11695590).

Almost surely, 2^85420631 is an apocalyptic number.

85420631 is a deficient number, since it is larger than the sum of its proper divisors (8144089).

85420631 is a wasteful number, since it uses less digits than its factorization.

85420631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173313.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 85420631 is about 9242.3282239920. The cubic root of 85420631 is about 440.4070458447.

The spelling of 85420631 in words is "eighty-five million, four hundred twenty thousand, six hundred thirty-one".