997467975 has 72 divisors (see below), whose sum is σ = 2063166560. Its totient is φ = 451215360.

The previous prime is 997467971. The next prime is 997468001. The reversal of 997467975 is 579764799.

It is not a de Polignac number, because 997467975 - 2² = 997467971 is a prime.

It is a super-2 number, since 2×997467975² = 1989884722301201250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997467971) 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 71 ways as a sum of consecutive naturals, for example, 149511 + ... + 156039.

Almost surely, 2^997467975 is an apocalyptic number.

997467975 is an abundant number, since it is smaller than the sum of its proper divisors (1065698585).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997467975 is a wasteful number, since it uses less digits than its factorization.

997467975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6649 (or 6641 counting only the distinct ones).

The product of its digits is 30005640, while the sum is 63.

The square root of 997467975 is about 31582.7163967889. The cubic root of 997467975 is about 999.1552783129.

The spelling of 997467975 in words is "nine hundred ninety-seven million, four hundred sixty-seven thousand, nine hundred seventy-five".