997536147 has 4 divisors (see below), whose sum is σ = 1330048200. Its totient is φ = 665024096.

The previous prime is 997536121. The next prime is 997536173. The reversal of 997536147 is 741635799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741635799 = 3 ⋅247211933.

It is an interprime number because it is at equal distance from previous prime (997536121) and next prime (997536173).

It is a cyclic number.

It is not a de Polignac number, because 997536147 - 2¹⁹ = 997011859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997536147.

It is not an unprimeable number, because it can be changed into a prime (997537147) 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, 166256022 + ... + 166256027.

It is an arithmetic number, because the mean of its divisors is an integer number (332512050).

Almost surely, 2^997536147 is an apocalyptic number.

997536147 is a deficient number, since it is larger than the sum of its proper divisors (332512053).

997536147 is a wasteful number, since it uses less digits than its factorization.

997536147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332512052.

The product of its digits is 1428840, while the sum is 51.

The square root of 997536147 is about 31583.7956395364. The cubic root of 997536147 is about 999.1780402339.

The spelling of 997536147 in words is "nine hundred ninety-seven million, five hundred thirty-six thousand, one hundred forty-seven".