85424731 has 8 divisors (see below), whose sum is σ = 97684704. Its totient is φ = 73178880.

The previous prime is 85424701. The next prime is 85424753. The reversal of 85424731 is 13742458.

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 85424731 - 2⁹ = 85424219 is a prime.

It is a super-2 number, since 2×85424731² = 14594769332844722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85424701) 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, 19281 + ... + 23293.

It is an arithmetic number, because the mean of its divisors is an integer number (12210588).

Almost surely, 2^85424731 is an apocalyptic number.

85424731 is a deficient number, since it is larger than the sum of its proper divisors (12259973).

85424731 is a wasteful number, since it uses less digits than its factorization.

85424731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061.

The product of its digits is 26880, while the sum is 34.

The square root of 85424731 is about 9242.5500269136. The cubic root of 85424731 is about 440.4140919177.

The spelling of 85424731 in words is "eighty-five million, four hundred twenty-four thousand, seven hundred thirty-one".