997290383 has 2 divisors, whose sum is σ = 997290384. Its totient is φ = 997290382.

The previous prime is 997290323. The next prime is 997290407. The reversal of 997290383 is 383092799.

It is a strong prime.

It is an emirp because it is prime and its reverse (383092799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997290383 - 2⁶ = 997290319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997290323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498645191 + 498645192.

It is an arithmetic number, because the mean of its divisors is an integer number (498645192).

Almost surely, 2^997290383 is an apocalyptic number.

997290383 is a deficient number, since it is larger than the sum of its proper divisors (1).

997290383 is an equidigital number, since it uses as much as digits as its factorization.

997290383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 997290383 is about 31579.9047338652. The cubic root of 997290383 is about 999.0959773226.

The spelling of 997290383 in words is "nine hundred ninety-seven million, two hundred ninety thousand, three hundred eighty-three".