1721342279 has 8 divisors (see below), whose sum is σ = 1741307040. Its totient is φ = 1701453600.

The previous prime is 1721342251. The next prime is 1721342339. The reversal of 1721342279 is 9722431271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1721342279 - 2¹⁶ = 1721276743 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 (1721342209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27134 + ... + 64644.

It is an arithmetic number, because the mean of its divisors is an integer number (217663380).

Almost surely, 2^1721342279 is an apocalyptic number.

1721342279 is a deficient number, since it is larger than the sum of its proper divisors (19964761).

1721342279 is a wasteful number, since it uses less digits than its factorization.

1721342279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38041.

The product of its digits is 42336, while the sum is 38.

The square root of 1721342279 is about 41489.0621610082. The cubic root of 1721342279 is about 1198.4568773740.

The spelling of 1721342279 in words is "one billion, seven hundred twenty-one million, three hundred forty-two thousand, two hundred seventy-nine".