997447593 has 4 divisors (see below), whose sum is σ = 1329930128. Its totient is φ = 664965060.

The previous prime is 997447553. The next prime is 997447609. The reversal of 997447593 is 395744799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 997447593 - 2¹² = 997443497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (997447513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166241263 + ... + 166241268.

It is an arithmetic number, because the mean of its divisors is an integer number (332482532).

Almost surely, 2^997447593 is an apocalyptic number.

It is an amenable number.

997447593 is a deficient number, since it is larger than the sum of its proper divisors (332482535).

997447593 is a wasteful number, since it uses less digits than its factorization.

997447593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332482534.

The product of its digits is 8573040, while the sum is 57.

The square root of 997447593 is about 31582.3937186528. The cubic root of 997447593 is about 999.1484727739.

The spelling of 997447593 in words is "nine hundred ninety-seven million, four hundred forty-seven thousand, five hundred ninety-three".