997141708847 has 2 divisors, whose sum is σ = 997141708848. Its totient is φ = 997141708846.

The previous prime is 997141708789. The next prime is 997141708859. The reversal of 997141708847 is 748807141799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997141708847 - 2²² = 997137514543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997141708877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498570854423 + 498570854424.

It is an arithmetic number, because the mean of its divisors is an integer number (498570854424).

Almost surely, 2^997141708847 is an apocalyptic number.

997141708847 is a deficient number, since it is larger than the sum of its proper divisors (1).

997141708847 is an equidigital number, since it uses as much as digits as its factorization.

997141708847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28449792, while the sum is 65.

The spelling of 997141708847 in words is "nine hundred ninety-seven billion, one hundred forty-one million, seven hundred eight thousand, eight hundred forty-seven".