17979045401 has 2 divisors, whose sum is σ = 17979045402. Its totient is φ = 17979045400.

The previous prime is 17979045367. The next prime is 17979045457. The reversal of 17979045401 is 10454097971.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15351457801 + 2627587600 = 123901^2 + 51260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17979045401 is a prime.

It is not a weakly prime, because it can be changed into another prime (17979045701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8989522700 + 8989522701.

It is an arithmetic number, because the mean of its divisors is an integer number (8989522701).

Almost surely, 2^17979045401 is an apocalyptic number.

It is an amenable number.

17979045401 is a deficient number, since it is larger than the sum of its proper divisors (1).

17979045401 is an equidigital number, since it uses as much as digits as its factorization.

17979045401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 47.

The spelling of 17979045401 in words is "seventeen billion, nine hundred seventy-nine million, forty-five thousand, four hundred one".