997905475 has 24 divisors (see below), whose sum is σ = 1415409408. Its totient is φ = 683680800.

The previous prime is 997905473. The next prime is 997905499. The reversal of 997905475 is 574509799.

997905475 is a nontrivial binomial coefficient, being equal to C(44675, 2).

It is not a de Polignac number, because 997905475 - 2¹ = 997905473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997905473) 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 23 ways as a sum of consecutive naturals, for example, 311130 + ... + 314320.

It is an arithmetic number, because the mean of its divisors is an integer number (58975392).

Almost surely, 2^997905475 is an apocalyptic number.

997905475 is the 44674-th triangular number.

997905475 is the 14892-nd centered nonagonal number.

997905475 is a deficient number, since it is larger than the sum of its proper divisors (417503933).

997905475 is a wasteful number, since it uses less digits than its factorization.

997905475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995 (or 4990 counting only the distinct ones).

The product of its (nonzero) digits is 3572100, while the sum is 55.

The square root of 997905475 is about 31589.6418941399. The cubic root of 997905475 is about 999.3013369837.

The spelling of 997905475 in words is "nine hundred ninety-seven million, nine hundred five thousand, four hundred seventy-five".