1997565095 has 32 divisors (see below), whose sum is σ = 2665958400. Its totient is φ = 1430545536.

The previous prime is 1997565091. The next prime is 1997565149. The reversal of 1997565095 is 5905657991.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1997565095 - 2² = 1997565091 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1997565095.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997565091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121772 + ... + 137198.

It is an arithmetic number, because the mean of its divisors is an integer number (83311200).

Almost surely, 2^1997565095 is an apocalyptic number.

1997565095 is a deficient number, since it is larger than the sum of its proper divisors (668393305).

1997565095 is a wasteful number, since it uses less digits than its factorization.

1997565095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15527.

The product of its (nonzero) digits is 3827250, while the sum is 56.

The square root of 1997565095 is about 44694.1281937572. The cubic root of 1997565095 is about 1259.4095442501.

The spelling of 1997565095 in words is "one billion, nine hundred ninety-seven million, five hundred sixty-five thousand, ninety-five".