1997610941597 has 4 divisors (see below), whose sum is σ = 1997837154816. Its totient is φ = 1997384728380.

The previous prime is 1997610941537. The next prime is 1997610941657. The reversal of 1997610941597 is 7951490167991.

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 an interprime number because it is at equal distance from previous prime (1997610941537) and next prime (1997610941657).

It is a cyclic number.

It is not a de Polignac number, because 1997610941597 - 2¹⁰ = 1997610940573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997610941537) 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, 113093363 + ... + 113111024.

It is an arithmetic number, because the mean of its divisors is an integer number (499459288704).

Almost surely, 2^{1997610941597} is an apocalyptic number.

It is an amenable number.

1997610941597 is a deficient number, since it is larger than the sum of its proper divisors (226213219).

1997610941597 is an equidigital number, since it uses as much as digits as its factorization.

1997610941597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226213218.

The product of its (nonzero) digits is 38578680, while the sum is 68.

The spelling of 1997610941597 in words is "one trillion, nine hundred ninety-seven billion, six hundred ten million, nine hundred forty-one thousand, five hundred ninety-seven".