1997712073 has 16 divisors (see below), whose sum is σ = 2297318400. Its totient is φ = 1701697536.

The previous prime is 1997712071. The next prime is 1997712107. The reversal of 1997712073 is 3702177991.

It is not a de Polignac number, because 1997712073 - 2¹ = 1997712071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1997712071) 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, 831528 + ... + 833926.

It is an arithmetic number, because the mean of its divisors is an integer number (143582400).

Almost surely, 2^1997712073 is an apocalyptic number.

It is an amenable number.

1997712073 is a deficient number, since it is larger than the sum of its proper divisors (299606327).

1997712073 is a wasteful number, since it uses less digits than its factorization.

1997712073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096.

The product of its (nonzero) digits is 166698, while the sum is 46.

The square root of 1997712073 is about 44695.7724287208. The cubic root of 1997712073 is about 1259.4404320138.

The spelling of 1997712073 in words is "one billion, nine hundred ninety-seven million, seven hundred twelve thousand, seventy-three".