1973267681 has 32 divisors (see below), whose sum is σ = 2619648000. Its totient is φ = 1470693840.

The previous prime is 1973267671. The next prime is 1973267729. The reversal of 1973267681 is 1867623791.

It is not a de Polignac number, because 1973267681 - 2¹⁸ = 1973005537 is a prime.

It is a super-2 number, since 2×1973267681² = 7787570681758235522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1973267651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75410 + ... + 98148.

It is an arithmetic number, because the mean of its divisors is an integer number (81864000).

Almost surely, 2^1973267681 is an apocalyptic number.

1973267681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1973267681 is a deficient number, since it is larger than the sum of its proper divisors (646380319).

1973267681 is a wasteful number, since it uses less digits than its factorization.

1973267681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22794 (or 22780 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 1973267681 is about 44421.4776994192. The cubic root of 1973267681 is about 1254.2824172477.

The spelling of 1973267681 in words is "one billion, nine hundred seventy-three million, two hundred sixty-seven thousand, six hundred eighty-one".