194545491 has 16 divisors (see below), whose sum is σ = 306014208. Its totient is φ = 107582400.

The previous prime is 194545469. The next prime is 194545499.

It is a happy number.

194545491 is nontrivially palindromic in base 10.

194545491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 194545491 - 2²⁶ = 127436627 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (194545499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148770 + ... + 150071.

It is an arithmetic number, because the mean of its divisors is an integer number (19125888).

Almost surely, 2^194545491 is an apocalyptic number.

194545491 is a deficient number, since it is larger than the sum of its proper divisors (111468717).

194545491 is a wasteful number, since it uses less digits than its factorization.

194545491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298882.

The product of its digits is 129600, while the sum is 42.

The square root of 194545491 is about 13947.9565169956. The cubic root of 194545491 is about 579.4381112032.

The spelling of 194545491 in words is "one hundred ninety-four million, five hundred forty-five thousand, four hundred ninety-one".