994145523 has 16 divisors (see below), whose sum is σ = 1520656896. Its totient is φ = 565920000.

The previous prime is 994145519. The next prime is 994145543. The reversal of 994145523 is 325541499.

It is not a de Polignac number, because 994145523 - 2² = 994145519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (994145543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84478 + ... + 95523.

It is an arithmetic number, because the mean of its divisors is an integer number (95041056).

Almost surely, 2^994145523 is an apocalyptic number.

994145523 is a deficient number, since it is larger than the sum of its proper divisors (526511373).

994145523 is a wasteful number, since it uses less digits than its factorization.

994145523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180274.

The product of its digits is 194400, while the sum is 42.

The square root of 994145523 is about 31530.0733110470. The cubic root of 994145523 is about 998.0446869093.

The spelling of 994145523 in words is "nine hundred ninety-four million, one hundred forty-five thousand, five hundred twenty-three".