85742479 has 4 divisors (see below), whose sum is σ = 86501376. Its totient is φ = 84983584.

The previous prime is 85742467. The next prime is 85742557. The reversal of 85742479 is 97424758.

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

It is a cyclic number.

It is not a de Polignac number, because 85742479 - 2¹³ = 85734287 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 (85722479) 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, 379279 + ... + 379504.

It is an arithmetic number, because the mean of its divisors is an integer number (21625344).

Almost surely, 2^85742479 is an apocalyptic number.

85742479 is a deficient number, since it is larger than the sum of its proper divisors (758897).

85742479 is a wasteful number, since it uses less digits than its factorization.

85742479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758896.

The product of its digits is 564480, while the sum is 46.

The square root of 85742479 is about 9259.7234839924. The cubic root of 85742479 is about 440.9594747513.

The spelling of 85742479 in words is "eighty-five million, seven hundred forty-two thousand, four hundred seventy-nine".