491201461 has 4 divisors (see below), whose sum is σ = 491818572. Its totient is φ = 490584352.

The previous prime is 491201453. The next prime is 491201467. The reversal of 491201461 is 164102194.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 302551236 + 188650225 = 17394^2 + 13735^2 .

It is a cyclic number.

It is not a de Polignac number, because 491201461 - 2³ = 491201453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491201467) 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, 307360 + ... + 308953.

It is an arithmetic number, because the mean of its divisors is an integer number (122954643).

Almost surely, 2^491201461 is an apocalyptic number.

It is an amenable number.

491201461 is a deficient number, since it is larger than the sum of its proper divisors (617111).

491201461 is an equidigital number, since it uses as much as digits as its factorization.

491201461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617110.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 491201461 is about 22163.0652437789. The cubic root of 491201461 is about 789.0173441474.

The spelling of 491201461 in words is "four hundred ninety-one million, two hundred one thousand, four hundred sixty-one".