997881272 has 8 divisors (see below), whose sum is σ = 1871027400. Its totient is φ = 498940632.

The previous prime is 997881223. The next prime is 997881359. The reversal of 997881272 is 272188799.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 62367572 + ... + 62367587.

It is an arithmetic number, because the mean of its divisors is an integer number (233878425).

Almost surely, 2^997881272 is an apocalyptic number.

It is an amenable number.

997881272 is a deficient number, since it is larger than the sum of its proper divisors (873146128).

997881272 is a wasteful number, since it uses less digits than its factorization.

997881272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124735165 (or 124735161 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 53.

The square root of 997881272 is about 31589.2588073858. The cubic root of 997881272 is about 999.2932579667.

The spelling of 997881272 in words is "nine hundred ninety-seven million, eight hundred eighty-one thousand, two hundred seventy-two".