491334431 has 4 divisors (see below), whose sum is σ = 561525072. Its totient is φ = 421143792.

The previous prime is 491334427. The next prime is 491334439. The reversal of 491334431 is 134433194.

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 491334431 - 2² = 491334427 is a prime.

It is a super-2 number, since 2×491334431² = 482819046172187522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491334439) 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, 35095310 + ... + 35095323.

It is an arithmetic number, because the mean of its divisors is an integer number (140381268).

Almost surely, 2^491334431 is an apocalyptic number.

491334431 is a deficient number, since it is larger than the sum of its proper divisors (70190641).

491334431 is an equidigital number, since it uses as much as digits as its factorization.

491334431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70190640.

The product of its digits is 15552, while the sum is 32.

The square root of 491334431 is about 22166.0648514796. The cubic root of 491334431 is about 789.0885343338.

The spelling of 491334431 in words is "four hundred ninety-one million, three hundred thirty-four thousand, four hundred thirty-one".