1597200001 has 4 divisors (see below), whose sum is σ = 1597572612. Its totient is φ = 1596827392.

The previous prime is 1597199993. The next prime is 1597200023. The reversal of 1597200001 is 1000027951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1000027951 = 13 ⋅76925227.

It can be written as a sum of positive squares in 2 ways, for example, as 400040001 + 1197160000 = 20001^2 + 34600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1597200001 - 2³ = 1597199993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1597200061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179800 + ... + 188473.

It is an arithmetic number, because the mean of its divisors is an integer number (399393153).

Almost surely, 2^1597200001 is an apocalyptic number.

It is an amenable number.

1597200001 is a deficient number, since it is larger than the sum of its proper divisors (372611).

1597200001 is an equidigital number, since it uses as much as digits as its factorization.

1597200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372610.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 1597200001 is about 39964.9846865978. The cubic root of 1597200001 is about 1168.9244263448.

Adding to 1597200001 its reverse (1000027951), we get a palindrome (2597227952).

The spelling of 1597200001 in words is "one billion, five hundred ninety-seven million, two hundred thousand, one".