163789999969 has 2 divisors, whose sum is σ = 163789999970. Its totient is φ = 163789999968.

The previous prime is 163789999951. The next prime is 163789999973. The reversal of 163789999969 is 969999987361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131177974225 + 32612025744 = 362185^2 + 180588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163789999969 is a prime.

It is a super-2 number, since 2×163789999969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163789999939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81894999984 + 81894999985.

It is an arithmetic number, because the mean of its divisors is an integer number (81894999985).

Almost surely, 2^163789999969 is an apocalyptic number.

It is an amenable number.

163789999969 is a deficient number, since it is larger than the sum of its proper divisors (1).

163789999969 is an equidigital number, since it uses as much as digits as its factorization.

163789999969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3214155168, while the sum is 85.

The spelling of 163789999969 in words is "one hundred sixty-three billion, seven hundred eighty-nine million, nine hundred ninety-nine thousand, nine hundred sixty-nine".