997790848501 has 2 divisors, whose sum is σ = 997790848502. Its totient is φ = 997790848500.

The previous prime is 997790848477. The next prime is 997790848513. The reversal of 997790848501 is 105848097799.

997790848501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 928621322500 + 69169526001 = 963650^2 + 263001^2 .

It is a cyclic number.

It is not a de Polignac number, because 997790848501 - 2¹¹ = 997790846453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997790848001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498895424250 + 498895424251.

It is an arithmetic number, because the mean of its divisors is an integer number (498895424251).

Almost surely, 2^997790848501 is an apocalyptic number.

It is an amenable number.

997790848501 is a deficient number, since it is larger than the sum of its proper divisors (1).

997790848501 is an equidigital number, since it uses as much as digits as its factorization.

997790848501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 67.

The spelling of 997790848501 in words is "nine hundred ninety-seven billion, seven hundred ninety million, eight hundred forty-eight thousand, five hundred one".