1720699141 has 12 divisors (see below), whose sum is σ = 2007962028. Its totient is φ = 1470219072.

The previous prime is 1720699139. The next prime is 1720699153. The reversal of 1720699141 is 1419960271.

It can be written as a sum of positive squares in 2 ways, for example, as 127012900 + 1593686241 = 11270^2 + 39921^2 .

It is not a de Polignac number, because 1720699141 - 2¹ = 1720699139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1720699094 and 1720699103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720699741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39856 + ... + 70921.

It is an arithmetic number, because the mean of its divisors is an integer number (167330169).

Almost surely, 2^1720699141 is an apocalyptic number.

It is an amenable number.

1720699141 is a deficient number, since it is larger than the sum of its proper divisors (287262887).

1720699141 is a wasteful number, since it uses less digits than its factorization.

1720699141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111108 (or 111101 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1720699141 is about 41481.3107435144. The cubic root of 1720699141 is about 1198.3076006183.

The spelling of 1720699141 in words is "one billion, seven hundred twenty million, six hundred ninety-nine thousand, one hundred forty-one".