971287398 has 24 divisors (see below), whose sum is σ = 2105064000. Its totient is φ = 323668944.

The previous prime is 971287379. The next prime is 971287403. The reversal of 971287398 is 893782179.

It is a super-2 number, since 2×971287398² = 1886798419027220808, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 88203 + ... + 98601.

It is an arithmetic number, because the mean of its divisors is an integer number (87711000).

Almost surely, 2^971287398 is an apocalyptic number.

971287398 is an abundant number, since it is smaller than the sum of its proper divisors (1133776602).

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

971287398 is a wasteful number, since it uses less digits than its factorization.

971287398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15596 (or 15593 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 971287398 is about 31165.4840809508. The cubic root of 971287398 is about 990.3360414170.

It can be divided in two parts, 971 and 287398, that added together give a square (288369 = 537²).

The spelling of 971287398 in words is "nine hundred seventy-one million, two hundred eighty-seven thousand, three hundred ninety-eight".