1997908036473 has 4 divisors (see below), whose sum is σ = 2663877381968. Its totient is φ = 1331938690980.

The previous prime is 1997908036459. The next prime is 1997908036483. The reversal of 1997908036473 is 3746308097991.

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 not a de Polignac number, because 1997908036473 - 2⁶ = 1997908036409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1997908036403) 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, 332984672743 + ... + 332984672748.

It is an arithmetic number, because the mean of its divisors is an integer number (665969345492).

Almost surely, 2^{1997908036473} is an apocalyptic number.

It is an amenable number.

1997908036473 is a deficient number, since it is larger than the sum of its proper divisors (665969345495).

1997908036473 is an equidigital number, since it uses as much as digits as its factorization.

1997908036473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665969345494.

The product of its (nonzero) digits is 61725888, while the sum is 66.

The spelling of 1997908036473 in words is "one trillion, nine hundred ninety-seven billion, nine hundred eight million, thirty-six thousand, four hundred seventy-three".