85629431 has 4 divisors (see below), whose sum is σ = 88582200. Its totient is φ = 82676664.

The previous prime is 85629413. The next prime is 85629451. The reversal of 85629431 is 13492658.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85629431 is a prime.

It is a super-2 number, since 2×85629431² = 14664798906767522, 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 (85629451) 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, 1476341 + ... + 1476398.

It is an arithmetic number, because the mean of its divisors is an integer number (22145550).

Almost surely, 2^85629431 is an apocalyptic number.

85629431 is a deficient number, since it is larger than the sum of its proper divisors (2952769).

85629431 is a wasteful number, since it uses less digits than its factorization.

85629431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952768.

The product of its digits is 51840, while the sum is 38.

The square root of 85629431 is about 9253.6171846473. The cubic root of 85629431 is about 440.7655937580.

The spelling of 85629431 in words is "eighty-five million, six hundred twenty-nine thousand, four hundred thirty-one".