1608139743 has 16 divisors (see below), whose sum is σ = 2451144960. Its totient is φ = 918694656.

The previous prime is 1608139723. The next prime is 1608139777. The reversal of 1608139743 is 3479318061.

It is not a de Polignac number, because 1608139743 - 2¹⁴ = 1608123359 is a prime.

It is a super-2 number, since 2×1608139743² = 5172226866032212098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1608139695 and 1608139704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608139723) 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, 98671 + ... + 113807.

It is an arithmetic number, because the mean of its divisors is an integer number (153196560).

Almost surely, 2^1608139743 is an apocalyptic number.

1608139743 is a deficient number, since it is larger than the sum of its proper divisors (843005217).

1608139743 is a wasteful number, since it uses less digits than its factorization.

1608139743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20206.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1608139743 is about 40101.6177105114. The cubic root of 1608139743 is about 1171.5871374324.

The spelling of 1608139743 in words is "one billion, six hundred eight million, one hundred thirty-nine thousand, seven hundred forty-three".