461721317 has 4 divisors (see below), whose sum is σ = 463518156. Its totient is φ = 459924480.

The previous prime is 461721313. The next prime is 461721329. The reversal of 461721317 is 713127164.

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 356227876 + 105493441 = 18874^2 + 10271^2 .

It is a cyclic number.

It is not a de Polignac number, because 461721317 - 2² = 461721313 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 (461721313) 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, 898034 + ... + 898547.

It is an arithmetic number, because the mean of its divisors is an integer number (115879539).

Almost surely, 2^461721317 is an apocalyptic number.

It is an amenable number.

461721317 is a deficient number, since it is larger than the sum of its proper divisors (1796839).

461721317 is a wasteful number, since it uses less digits than its factorization.

461721317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796838.

The product of its digits is 7056, while the sum is 32.

The square root of 461721317 is about 21487.7015290142. The cubic root of 461721317 is about 772.9059345413.

The spelling of 461721317 in words is "four hundred sixty-one million, seven hundred twenty-one thousand, three hundred seventeen".