1972837666831 has 2 divisors, whose sum is σ = 1972837666832. Its totient is φ = 1972837666830.

The previous prime is 1972837666799. The next prime is 1972837666843. The reversal of 1972837666831 is 1386667382791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1972837666831 - 2⁵ = 1972837666799 is a prime.

It is a super-2 number, since 2×1972837666831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972837660831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986418833415 + 986418833416.

It is an arithmetic number, because the mean of its divisors is an integer number (986418833416).

Almost surely, 2^{1972837666831} is an apocalyptic number.

1972837666831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972837666831 is an equidigital number, since it uses as much as digits as its factorization.

1972837666831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109734912, while the sum is 67.

The spelling of 1972837666831 in words is "one trillion, nine hundred seventy-two billion, eight hundred thirty-seven million, six hundred sixty-six thousand, eight hundred thirty-one".