997149133 has 4 divisors (see below), whose sum is σ = 1018365120. Its totient is φ = 975933148.

The previous prime is 997149073. The next prime is 997149163. The reversal of 997149133 is 331941799.

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 a cyclic number.

It is not a de Polignac number, because 997149133 - 2¹³ = 997140941 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 (997149163) 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 3 ways as a sum of consecutive naturals, for example, 10607923 + ... + 10608016.

It is an arithmetic number, because the mean of its divisors is an integer number (254591280).

Almost surely, 2^997149133 is an apocalyptic number.

It is an amenable number.

997149133 is a deficient number, since it is larger than the sum of its proper divisors (21215987).

997149133 is a wasteful number, since it uses less digits than its factorization.

997149133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21215986.

The product of its digits is 183708, while the sum is 46.

The square root of 997149133 is about 31577.6682641388. The cubic root of 997149133 is about 999.0488065178.

The spelling of 997149133 in words is "nine hundred ninety-seven million, one hundred forty-nine thousand, one hundred thirty-three".