991722484 has 6 divisors (see below), whose sum is σ = 1735514354. Its totient is φ = 495861240.

The previous prime is 991722467. The next prime is 991722493. The reversal of 991722484 is 484227199.

It can be written as a sum of positive squares in only one way, i.e., 523952100 + 467770384 = 22890^2 + 21628^2 .

It is a super-2 number, since 2×991722484² = 1967026970542260512, which contains 22 as substring.

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, 123965307 + ... + 123965314.

Almost surely, 2^991722484 is an apocalyptic number.

It is an amenable number.

991722484 is a deficient number, since it is larger than the sum of its proper divisors (743791870).

991722484 is a wasteful number, since it uses less digits than its factorization.

991722484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247930625 (or 247930623 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 991722484 is about 31491.6256169795. The cubic root of 991722484 is about 997.2331797661.

The spelling of 991722484 in words is "nine hundred ninety-one million, seven hundred twenty-two thousand, four hundred eighty-four".