1997130117 has 16 divisors (see below), whose sum is σ = 2714506560. Its totient is φ = 1305696000.

The previous prime is 1997130101. The next prime is 1997130119. The reversal of 1997130117 is 7110317991.

It is not a de Polignac number, because 1997130117 - 2⁴ = 1997130101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997130119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61117 + ... + 87917.

It is an arithmetic number, because the mean of its divisors is an integer number (169656660).

Almost surely, 2^1997130117 is an apocalyptic number.

It is an amenable number.

1997130117 is a deficient number, since it is larger than the sum of its proper divisors (717376443).

1997130117 is a wasteful number, since it uses less digits than its factorization.

1997130117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27284.

The product of its (nonzero) digits is 11907, while the sum is 39.

The square root of 1997130117 is about 44689.2617638734. The cubic root of 1997130117 is about 1259.3181237479.

The spelling of 1997130117 in words is "one billion, nine hundred ninety-seven million, one hundred thirty thousand, one hundred seventeen".