1997524212727 has 2 divisors, whose sum is σ = 1997524212728. Its totient is φ = 1997524212726.

The previous prime is 1997524212721. The next prime is 1997524212769. The reversal of 1997524212727 is 7272124257991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997524212727 is a prime.

It is a super-2 number, since 2×1997524212727² (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 (1997524212721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998762106363 + 998762106364.

It is an arithmetic number, because the mean of its divisors is an integer number (998762106364).

Almost surely, 2^{1997524212727} is an apocalyptic number.

1997524212727 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997524212727 is an equidigital number, since it uses as much as digits as its factorization.

1997524212727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8890560, while the sum is 58.

The spelling of 1997524212727 in words is "one trillion, nine hundred ninety-seven billion, five hundred twenty-four million, two hundred twelve thousand, seven hundred twenty-seven".