481761309 has 4 divisors (see below), whose sum is σ = 642348416. Its totient is φ = 321174204.

The previous prime is 481761281. The next prime is 481761323. The reversal of 481761309 is 903167184.

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 de Polignac number, because none of the positive numbers 2^k-481761309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481721309) 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, 80293549 + ... + 80293554.

It is an arithmetic number, because the mean of its divisors is an integer number (160587104).

Almost surely, 2^481761309 is an apocalyptic number.

It is an amenable number.

481761309 is a deficient number, since it is larger than the sum of its proper divisors (160587107).

481761309 is a wasteful number, since it uses less digits than its factorization.

481761309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160587106.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 481761309 is about 21949.0616883729. The cubic root of 481761309 is about 783.9300386386.

The spelling of 481761309 in words is "four hundred eighty-one million, seven hundred sixty-one thousand, three hundred nine".