971781336 has 48 divisors (see below), whose sum is σ = 2786729400. Its totient is φ = 304872192.

The previous prime is 971781323. The next prime is 971781337. The reversal of 971781336 is 633187179.

It is a junction number, because it is equal to n+sod(n) for n = 971781291 and 971781300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971781337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395746 + ... + 398193.

Almost surely, 2^971781336 is an apocalyptic number.

It is an amenable number.

971781336 is an abundant number, since it is smaller than the sum of its proper divisors (1814948064).

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

971781336 is a wasteful number, since it uses less digits than its factorization.

971781336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793968 (or 793961 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 971781336 is about 31173.4075134561. The cubic root of 971781336 is about 990.5038879638.

The spelling of 971781336 in words is "nine hundred seventy-one million, seven hundred eighty-one thousand, three hundred thirty-six".