481491997 has 4 divisors (see below), whose sum is σ = 550276576. Its totient is φ = 412707420.

The previous prime is 481491991. The next prime is 481492009. The reversal of 481491997 is 799194184.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 481491997 - 2¹⁵ = 481459229 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 (481491991) 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 3 ways as a sum of consecutive naturals, for example, 34392279 + ... + 34392292.

It is an arithmetic number, because the mean of its divisors is an integer number (137569144).

Almost surely, 2^481491997 is an apocalyptic number.

It is an amenable number.

481491997 is a deficient number, since it is larger than the sum of its proper divisors (68784579).

481491997 is an equidigital number, since it uses as much as digits as its factorization.

481491997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68784578.

The product of its digits is 653184, while the sum is 52.

The square root of 481491997 is about 21942.9258987948. The cubic root of 481491997 is about 783.7839350841.

The spelling of 481491997 in words is "four hundred eighty-one million, four hundred ninety-one thousand, nine hundred ninety-seven".