1997325133 has 4 divisors (see below), whose sum is σ = 2061755008. Its totient is φ = 1932895260.

The previous prime is 1997325131. The next prime is 1997325181. The reversal of 1997325133 is 3315237991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1997325133 - 2¹ = 1997325131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1997325133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997325131) 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, 32214891 + ... + 32214952.

It is an arithmetic number, because the mean of its divisors is an integer number (515438752).

Almost surely, 2^1997325133 is an apocalyptic number.

It is an amenable number.

1997325133 is a deficient number, since it is larger than the sum of its proper divisors (64429875).

1997325133 is an equidigital number, since it uses as much as digits as its factorization.

1997325133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64429874.

The product of its digits is 153090, while the sum is 43.

The square root of 1997325133 is about 44691.4436217941. The cubic root of 1997325133 is about 1259.3591124292.

The spelling of 1997325133 in words is "one billion, nine hundred ninety-seven million, three hundred twenty-five thousand, one hundred thirty-three".