991002484 has 6 divisors (see below), whose sum is σ = 1734254354. Its totient is φ = 495501240.

The previous prime is 991002457. The next prime is 991002497. The reversal of 991002484 is 484200199.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 719741584 + 271260900 = 26828^2 + 16470^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123875307 + ... + 123875314.

Almost surely, 2^991002484 is an apocalyptic number.

It is an amenable number.

991002484 is a deficient number, since it is larger than the sum of its proper divisors (743251870).

991002484 is a wasteful number, since it uses less digits than its factorization.

991002484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247750625 (or 247750623 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 991002484 is about 31480.1919307999. The cubic root of 991002484 is about 996.9917877331.

The spelling of 991002484 in words is "nine hundred ninety-one million, two thousand, four hundred eighty-four".