1723317421 has 16 divisors (see below), whose sum is σ = 2086459776. Its totient is φ = 1389505536.

The previous prime is 1723317397. The next prime is 1723317433. The reversal of 1723317421 is 1247133271.

It is a cyclic number.

It is not a de Polignac number, because 1723317421 - 2¹⁷ = 1723186349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1723317121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410485 + ... + 414661.

It is an arithmetic number, because the mean of its divisors is an integer number (130403736).

Almost surely, 2^1723317421 is an apocalyptic number.

It is an amenable number.

1723317421 is a deficient number, since it is larger than the sum of its proper divisors (363142355).

1723317421 is a wasteful number, since it uses less digits than its factorization.

1723317421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668.

The product of its digits is 7056, while the sum is 31.

The square root of 1723317421 is about 41512.8585019148. The cubic root of 1723317421 is about 1198.9150891118.

The spelling of 1723317421 in words is "one billion, seven hundred twenty-three million, three hundred seventeen thousand, four hundred twenty-one".