997043237 has 8 divisors (see below), whose sum is σ = 1008852120. Its totient is φ = 985248000.

The previous prime is 997043233. The next prime is 997043249. The reversal of 997043237 is 732340799.

It can be written as a sum of positive squares in 4 ways, for example, as 70997476 + 926045761 = 8426^2 + 30431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 997043237 - 2² = 997043233 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997043233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265223 + ... + 268955.

It is an arithmetic number, because the mean of its divisors is an integer number (126106515).

Almost surely, 2^997043237 is an apocalyptic number.

It is an amenable number.

997043237 is a deficient number, since it is larger than the sum of its proper divisors (11808883).

997043237 is a wasteful number, since it uses less digits than its factorization.

997043237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6823.

The product of its (nonzero) digits is 285768, while the sum is 44.

The square root of 997043237 is about 31575.9914650356. The cubic root of 997043237 is about 999.0134393515.

The spelling of 997043237 in words is "nine hundred ninety-seven million, forty-three thousand, two hundred thirty-seven".