163956803 has 2 divisors, whose sum is σ = 163956804. Its totient is φ = 163956802.

The previous prime is 163956787. The next prime is 163956817. The reversal of 163956803 is 308659361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163956803 - 2⁴ = 163956787 is a prime.

It is not a weakly prime, because it can be changed into another prime (163956853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81978401 + 81978402.

It is an arithmetic number, because the mean of its divisors is an integer number (81978402).

Almost surely, 2^163956803 is an apocalyptic number.

163956803 is a deficient number, since it is larger than the sum of its proper divisors (1).

163956803 is an equidigital number, since it uses as much as digits as its factorization.

163956803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 163956803 is about 12804.5618042946. The cubic root of 163956803 is about 547.3223048090.

The spelling of 163956803 in words is "one hundred sixty-three million, nine hundred fifty-six thousand, eight hundred three".