997442972447 has 2 divisors, whose sum is σ = 997442972448. Its totient is φ = 997442972446.

The previous prime is 997442972417. The next prime is 997442972501. The reversal of 997442972447 is 744279244799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997442972447 - 2¹⁴ = 997442956063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997442972417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498721486223 + 498721486224.

It is an arithmetic number, because the mean of its divisors is an integer number (498721486224).

Almost surely, 2^997442972447 is an apocalyptic number.

997442972447 is a deficient number, since it is larger than the sum of its proper divisors (1).

997442972447 is an equidigital number, since it uses as much as digits as its factorization.

997442972447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256048128, while the sum is 68.

The spelling of 997442972447 in words is "nine hundred ninety-seven billion, four hundred forty-two million, nine hundred seventy-two thousand, four hundred forty-seven".