1720142889 has 16 divisors (see below), whose sum is σ = 2357150400. Its totient is φ = 1115182656.

The previous prime is 1720142881. The next prime is 1720142899. The reversal of 1720142889 is 9882410271.

It is not a de Polignac number, because 1720142889 - 2³ = 1720142881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1720142889.

It is not an unprimeable number, because it can be changed into a prime (1720142881) 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, 427 + ... + 58655.

It is an arithmetic number, because the mean of its divisors is an integer number (147321900).

Almost surely, 2^1720142889 is an apocalyptic number.

It is an amenable number.

1720142889 is a deficient number, since it is larger than the sum of its proper divisors (637007511).

1720142889 is a wasteful number, since it uses less digits than its factorization.

1720142889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58504.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 1720142889 is about 41474.6053507444. The cubic root of 1720142889 is about 1198.1784607001.

The spelling of 1720142889 in words is "one billion, seven hundred twenty million, one hundred forty-two thousand, eight hundred eighty-nine".