1997484665 has 16 divisors (see below), whose sum is σ = 2640283776. Its totient is φ = 1438608000.

The previous prime is 1997484607. The next prime is 1997484679. The reversal of 1997484665 is 5664847991.

It is not a de Polignac number, because 1997484665 - 2¹⁶ = 1997419129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170636 + ... + 181965.

It is an arithmetic number, because the mean of its divisors is an integer number (165017736).

Almost surely, 2^1997484665 is an apocalyptic number.

It is an amenable number.

1997484665 is a deficient number, since it is larger than the sum of its proper divisors (642799111).

1997484665 is a wasteful number, since it uses less digits than its factorization.

1997484665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352720.

The product of its digits is 13063680, while the sum is 59.

The square root of 1997484665 is about 44693.2284020745. The cubic root of 1997484665 is about 1259.3926410597.

The spelling of 1997484665 in words is "one billion, nine hundred ninety-seven million, four hundred eighty-four thousand, six hundred sixty-five".