994328551 has 4 divisors (see below), whose sum is σ = 996070504. Its totient is φ = 992586600.

The previous prime is 994328509. The next prime is 994328557. The reversal of 994328551 is 155823499.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994328551 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 (994328557) 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, 870120 + ... + 871261.

It is an arithmetic number, because the mean of its divisors is an integer number (249017626).

Almost surely, 2^994328551 is an apocalyptic number.

994328551 is a deficient number, since it is larger than the sum of its proper divisors (1741953).

994328551 is a wasteful number, since it uses less digits than its factorization.

994328551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741952.

The product of its digits is 388800, while the sum is 46.

The square root of 994328551 is about 31532.9756128406. The cubic root of 994328551 is about 998.1059317705.

The spelling of 994328551 in words is "nine hundred ninety-four million, three hundred twenty-eight thousand, five hundred fifty-one".