1973765487931 has 2 divisors, whose sum is σ = 1973765487932. Its totient is φ = 1973765487930.

The previous prime is 1973765487887. The next prime is 1973765487949. The reversal of 1973765487931 is 1397845673791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1973765487931 - 2²³ = 1973757099323 is a prime.

It is a super-2 number, since 2×1973765487931² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1973765487971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986882743965 + 986882743966.

It is an arithmetic number, because the mean of its divisors is an integer number (986882743966).

Almost surely, 2^{1973765487931} is an apocalyptic number.

1973765487931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973765487931 is an equidigital number, since it uses as much as digits as its factorization.

1973765487931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240045120, while the sum is 70.

The spelling of 1973765487931 in words is "one trillion, nine hundred seventy-three billion, seven hundred sixty-five million, four hundred eighty-seven thousand, nine hundred thirty-one".