999552901 has 4 divisors (see below), whose sum is σ = 1020820032. Its totient is φ = 978285772.

The previous prime is 999552881. The next prime is 999552919. The reversal of 999552901 is 109255999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109255999 = 6911 ⋅15809.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999552901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999552971) 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 3 ways as a sum of consecutive naturals, for example, 10633495 + ... + 10633588.

It is an arithmetic number, because the mean of its divisors is an integer number (255205008).

Almost surely, 2^999552901 is an apocalyptic number.

It is an amenable number.

999552901 is a deficient number, since it is larger than the sum of its proper divisors (21267131).

999552901 is a wasteful number, since it uses less digits than its factorization.

999552901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21267130.

The product of its (nonzero) digits is 328050, while the sum is 49.

The square root of 999552901 is about 31615.7065554449. The cubic root of 999552901 is about 999.8509447836.

The spelling of 999552901 in words is "nine hundred ninety-nine million, five hundred fifty-two thousand, nine hundred one".