981475980403 has 4 divisors (see below), whose sum is σ = 981511120008. Its totient is φ = 981440840800.

The previous prime is 981475980389. The next prime is 981475980421. The reversal of 981475980403 is 304089574189.

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-981475980403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981475980473) 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, 17527873 + ... + 17583778.

It is an arithmetic number, because the mean of its divisors is an integer number (245377780002).

Almost surely, 2^981475980403 is an apocalyptic number.

981475980403 is a deficient number, since it is larger than the sum of its proper divisors (35139605).

981475980403 is a wasteful number, since it uses less digits than its factorization.

981475980403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35139604.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 981475980403 in words is "nine hundred eighty-one billion, four hundred seventy-five million, nine hundred eighty thousand, four hundred three".