1972747405579 has 2 divisors, whose sum is σ = 1972747405580. Its totient is φ = 1972747405578.

The previous prime is 1972747405501. The next prime is 1972747405589. The reversal of 1972747405579 is 9755047472791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1972747405579 - 2⁷ = 1972747405451 is a prime.

It is not a weakly prime, because it can be changed into another prime (1972747405589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986373702789 + 986373702790.

It is an arithmetic number, because the mean of its divisors is an integer number (986373702790).

Almost surely, 2^{1972747405579} is an apocalyptic number.

1972747405579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972747405579 is an equidigital number, since it uses as much as digits as its factorization.

1972747405579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155584800, while the sum is 67.

The spelling of 1972747405579 in words is "one trillion, nine hundred seventy-two billion, seven hundred forty-seven million, four hundred five thousand, five hundred seventy-nine".