997675489 has 4 divisors (see below), whose sum is σ = 998736660. Its totient is φ = 996614320.

The previous prime is 997675423. The next prime is 997675499. The reversal of 997675489 is 984576799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 826275025 + 171400464 = 28745^2 + 13092^2 .

It is a cyclic number.

It is not a de Polignac number, because 997675489 - 2¹⁷ = 997544417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997675489.

It is not an unprimeable number, because it can be changed into a prime (997675499) 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, 529174 + ... + 531055.

It is an arithmetic number, because the mean of its divisors is an integer number (249684165).

Almost surely, 2^997675489 is an apocalyptic number.

It is an amenable number.

997675489 is a deficient number, since it is larger than the sum of its proper divisors (1061171).

997675489 is a wasteful number, since it uses less digits than its factorization.

997675489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061170.

The product of its digits is 34292160, while the sum is 64.

The square root of 997675489 is about 31586.0014721712. The cubic root of 997675489 is about 999.2245618511.

The spelling of 997675489 in words is "nine hundred ninety-seven million, six hundred seventy-five thousand, four hundred eighty-nine".