85342639 has 4 divisors (see below), whose sum is σ = 86544720. Its totient is φ = 84140560.

The previous prime is 85342589. The next prime is 85342651. The reversal of 85342639 is 93624358.

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-85342639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85342139) 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, 600934 + ... + 601075.

It is an arithmetic number, because the mean of its divisors is an integer number (21636180).

Almost surely, 2^85342639 is an apocalyptic number.

85342639 is a deficient number, since it is larger than the sum of its proper divisors (1202081).

85342639 is a wasteful number, since it uses less digits than its factorization.

85342639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202080.

The product of its digits is 155520, while the sum is 40.

The square root of 85342639 is about 9238.1079772863. The cubic root of 85342639 is about 440.2729693930.

The spelling of 85342639 in words is "eighty-five million, three hundred forty-two thousand, six hundred thirty-nine".