997880772249 has 12 divisors (see below), whose sum is σ = 1442690136576. Its totient is φ = 664650710232.

The previous prime is 997880772221. The next prime is 997880772277. The reversal of 997880772249 is 942277088799.

It is an interprime number because it is at equal distance from previous prime (997880772221) and next prime (997880772277).

It is not a de Polignac number, because 997880772249 - 2⁹ = 997880771737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997880772289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50251017 + ... + 50270870.

It is an arithmetic number, because the mean of its divisors is an integer number (120224178048).

Almost surely, 2^997880772249 is an apocalyptic number.

It is an amenable number.

997880772249 is a deficient number, since it is larger than the sum of its proper divisors (444809364327).

997880772249 is a wasteful number, since it uses less digits than its factorization.

997880772249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100522996 (or 100522993 counting only the distinct ones).

The product of its (nonzero) digits is 256048128, while the sum is 72.

The spelling of 997880772249 in words is "nine hundred ninety-seven billion, eight hundred eighty million, seven hundred seventy-two thousand, two hundred forty-nine".