1599920001 has 27 divisors (see below), whose sum is σ = 2357851041. Its totient is φ = 1045413864.

The previous prime is 1599919973. The next prime is 1599920027. The reversal of 1599920001 is 1000299951.

The square root of 1599920001 is 39999.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1599920001 - 2¹¹ = 1599917953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1599920501) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8039700 + ... + 8039898.

Almost surely, 2^1599920001 is an apocalyptic number.

1599920001 is the 39999-th square number.

1599920001 is the 20000-th centered octagonal number.

It is an amenable number.

1599920001 is a deficient number, since it is larger than the sum of its proper divisors (757931040).

1599920001 is an frugal number, since it uses more digits than its factorization.

1599920001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The cubic root of 1599920001 is about 1169.5876017523.

Multiplying 1599920001 by its sum of digits (36), we get a square (57597120036 = 239994²).

It can be divided in two parts, 1599 and 920001, that added together give a square (921600 = 960²).

The spelling of 1599920001 in words is "one billion, five hundred ninety-nine million, nine hundred twenty thousand, one".