994101721523 has 4 divisors (see below), whose sum is σ = 994108845888. Its totient is φ = 994094597160.

The previous prime is 994101721493. The next prime is 994101721553. The reversal of 994101721523 is 325127101499.

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

It is an interprime number because it is at equal distance from previous prime (994101721493) and next prime (994101721553).

It is a cyclic number.

It is not a de Polignac number, because 994101721523 - 2¹⁰ = 994101720499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994101721553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3348611 + ... + 3633372.

It is an arithmetic number, because the mean of its divisors is an integer number (248527211472).

Almost surely, 2^994101721523 is an apocalyptic number.

994101721523 is a deficient number, since it is larger than the sum of its proper divisors (7124365).

994101721523 is a wasteful number, since it uses less digits than its factorization.

994101721523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7124364.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 994101721523 in words is "nine hundred ninety-four billion, one hundred one million, seven hundred twenty-one thousand, five hundred twenty-three".