1973663791 has 12 divisors (see below), whose sum is σ = 2177102536. Its totient is φ = 1787868720.

The previous prime is 1973663761. The next prime is 1973663801.

1973663791 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1973663791 - 2¹⁷ = 1973532719 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 (1973663761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5425 + ... + 63061.

Almost surely, 2^1973663791 is an apocalyptic number.

1973663791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1973663791 is a deficient number, since it is larger than the sum of its proper divisors (203438745).

1973663791 is a wasteful number, since it uses less digits than its factorization.

1973663791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57942 (or 57931 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 52.

The square root of 1973663791 is about 44425.9360171511. The cubic root of 1973663791 is about 1254.3663390546.

The spelling of 1973663791 in words is "one billion, nine hundred seventy-three million, six hundred sixty-three thousand, seven hundred ninety-one".