997558047 has 36 divisors (see below), whose sum is σ = 1515556224. Its totient is φ = 632216640.

The previous prime is 997558031. The next prime is 997558087. The reversal of 997558047 is 740855799.

It is not a de Polignac number, because 997558047 - 2⁴ = 997558031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997557984 and 997558002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997558027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 908803 + ... + 909899.

It is an arithmetic number, because the mean of its divisors is an integer number (42098784).

Almost surely, 2^997558047 is an apocalyptic number.

997558047 is a deficient number, since it is larger than the sum of its proper divisors (517998177).

997558047 is a wasteful number, since it uses less digits than its factorization.

997558047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1314 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The square root of 997558047 is about 31584.1423344057. The cubic root of 997558047 is about 999.1853521958.

The spelling of 997558047 in words is "nine hundred ninety-seven million, five hundred fifty-eight thousand, forty-seven".