1720475279 has 16 divisors (see below), whose sum is σ = 1876165632. Its totient is φ = 1573158048.

The previous prime is 1720475261. The next prime is 1720475291. The reversal of 1720475279 is 9725740271.

It is not a de Polignac number, because 1720475279 - 2¹² = 1720471183 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 (1720475219) 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 15 ways as a sum of consecutive naturals, for example, 27977 + ... + 64989.

It is an arithmetic number, because the mean of its divisors is an integer number (117260352).

Almost surely, 2^1720475279 is an apocalyptic number.

1720475279 is a deficient number, since it is larger than the sum of its proper divisors (155690353).

1720475279 is a wasteful number, since it uses less digits than its factorization.

1720475279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37126.

The product of its (nonzero) digits is 246960, while the sum is 44.

The square root of 1720475279 is about 41478.6123080317. The cubic root of 1720475279 is about 1198.2556319807.

The spelling of 1720475279 in words is "one billion, seven hundred twenty million, four hundred seventy-five thousand, two hundred seventy-nine".