1205231577973 has 2 divisors, whose sum is σ = 1205231577974. Its totient is φ = 1205231577972.

The previous prime is 1205231577967. The next prime is 1205231577983. The reversal of 1205231577973 is 3797751325021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1106584075249 + 98647502724 = 1051943^2 + 314082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205231577973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1205231577973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205231577983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602615788986 + 602615788987.

It is an arithmetic number, because the mean of its divisors is an integer number (602615788987).

Almost surely, 2^{1205231577973} is an apocalyptic number.

It is an amenable number.

1205231577973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205231577973 is an equidigital number, since it uses as much as digits as its factorization.

1205231577973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2778300, while the sum is 52.

The spelling of 1205231577973 in words is "one trillion, two hundred five billion, two hundred thirty-one million, five hundred seventy-seven thousand, nine hundred seventy-three".