85074391 has 4 divisors (see below), whose sum is σ = 85855000. Its totient is φ = 84293784.

The previous prime is 85074383. The next prime is 85074403. The reversal of 85074391 is 19347058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19347058 = 2 ⋅9673529.

It is a cyclic number.

It is not a de Polignac number, because 85074391 - 2³ = 85074383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85074391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85074331) 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, 390141 + ... + 390358.

It is an arithmetic number, because the mean of its divisors is an integer number (21463750).

Almost surely, 2^85074391 is an apocalyptic number.

85074391 is a deficient number, since it is larger than the sum of its proper divisors (780609).

85074391 is a wasteful number, since it uses less digits than its factorization.

85074391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780608.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 85074391 is about 9223.5779933820. The cubic root of 85074391 is about 439.8111982677.

The spelling of 85074391 in words is "eighty-five million, seventy-four thousand, three hundred ninety-one".