997447599 has 24 divisors (see below), whose sum is σ = 1489488000. Its totient is φ = 642539520.

The previous prime is 997447553. The next prime is 997447609. The reversal of 997447599 is 995744799.

997447599 is a `hidden beast` number, since 9 + 9 + 74 + 475 + 99 = 666.

It is not a de Polignac number, because 997447599 - 2⁸ = 997447343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997447699) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212227 + ... + 216875.

It is an arithmetic number, because the mean of its divisors is an integer number (62062000).

Almost surely, 2^997447599 is an apocalyptic number.

997447599 is a deficient number, since it is larger than the sum of its proper divisors (492040401).

997447599 is a wasteful number, since it uses less digits than its factorization.

997447599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455 (or 5452 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 63.

The square root of 997447599 is about 31582.3938136424. The cubic root of 997447599 is about 999.1484747773.

The spelling of 997447599 in words is "nine hundred ninety-seven million, four hundred forty-seven thousand, five hundred ninety-nine".