997740361 has 4 divisors (see below), whose sum is σ = 997844224. Its totient is φ = 997636500.

The previous prime is 997740347. The next prime is 997740377. The reversal of 997740361 is 163047799.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 163047799 = 17 ⋅9591047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997740361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997710361) 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 3 ways as a sum of consecutive naturals, for example, 35865 + ... + 57286.

It is an arithmetic number, because the mean of its divisors is an integer number (249461056).

Almost surely, 2^997740361 is an apocalyptic number.

It is an amenable number.

997740361 is a deficient number, since it is larger than the sum of its proper divisors (103863).

997740361 is a wasteful number, since it uses less digits than its factorization.

997740361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103862.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 997740361 is about 31587.0283660872. The cubic root of 997740361 is about 999.2462189569.

The spelling of 997740361 in words is "nine hundred ninety-seven million, seven hundred forty thousand, three hundred sixty-one".