985425091 has 4 divisors (see below), whose sum is σ = 1126200112. Its totient is φ = 844650072.

The previous prime is 985425047. The next prime is 985425121. The reversal of 985425091 is 190524589.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190524589 = 3461 ⋅55049.

It is not a de Polignac number, because 985425091 - 2¹⁵ = 985392323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985425031) 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, 70387500 + ... + 70387513.

It is an arithmetic number, because the mean of its divisors is an integer number (281550028).

Almost surely, 2^985425091 is an apocalyptic number.

985425091 is a deficient number, since it is larger than the sum of its proper divisors (140775021).

985425091 is a wasteful number, since it uses less digits than its factorization.

985425091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140775020.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 985425091 is about 31391.4811851878. The cubic root of 985425091 is about 995.1179008964.

The spelling of 985425091 in words is "nine hundred eighty-five million, four hundred twenty-five thousand, ninety-one".