1974997517 has 4 divisors (see below), whose sum is σ = 1975839936. Its totient is φ = 1974155100.

The previous prime is 1974997501. The next prime is 1974997529. The reversal of 1974997517 is 7157994791.

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 a cyclic number.

It is not a de Polignac number, because 1974997517 - 2⁴ = 1974997501 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 (1974997537) 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, 417683 + ... + 422384.

It is an arithmetic number, because the mean of its divisors is an integer number (493959984).

Almost surely, 2^1974997517 is an apocalyptic number.

It is an amenable number.

1974997517 is a deficient number, since it is larger than the sum of its proper divisors (842419).

1974997517 is an equidigital number, since it uses as much as digits as its factorization.

1974997517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842418.

The product of its digits is 5000940, while the sum is 59.

The square root of 1974997517 is about 44440.9441506366. The cubic root of 1974997517 is about 1254.6488262583.

The spelling of 1974997517 in words is "one billion, nine hundred seventy-four million, nine hundred ninety-seven thousand, five hundred seventeen".