163900979387 has 2 divisors, whose sum is σ = 163900979388. Its totient is φ = 163900979386.

The previous prime is 163900979323. The next prime is 163900979393. The reversal of 163900979387 is 783979009361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163900979387 - 2⁶ = 163900979323 is a prime.

It is not a weakly prime, because it can be changed into another prime (163900979317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81950489693 + 81950489694.

It is an arithmetic number, because the mean of its divisors is an integer number (81950489694).

Almost surely, 2^163900979387 is an apocalyptic number.

163900979387 is a deficient number, since it is larger than the sum of its proper divisors (1).

163900979387 is an equidigital number, since it uses as much as digits as its factorization.

163900979387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15431472, while the sum is 62.

The spelling of 163900979387 in words is "one hundred sixty-three billion, nine hundred million, nine hundred seventy-nine thousand, three hundred eighty-seven".