161389763 has 2 divisors, whose sum is σ = 161389764. Its totient is φ = 161389762.

The previous prime is 161389729. The next prime is 161389807. The reversal of 161389763 is 367983161.

It is an a-pointer prime, because the next prime (161389807) can be obtained adding 161389763 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161389763 - 2²⁰ = 160341187 is a prime.

It is not a weakly prime, because it can be changed into another prime (161389463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80694881 + 80694882.

It is an arithmetic number, because the mean of its divisors is an integer number (80694882).

Almost surely, 2^161389763 is an apocalyptic number.

161389763 is a deficient number, since it is larger than the sum of its proper divisors (1).

161389763 is an equidigital number, since it uses as much as digits as its factorization.

161389763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 161389763 is about 12703.9270700048. The cubic root of 161389763 is about 544.4508263201.

The spelling of 161389763 in words is "one hundred sixty-one million, three hundred eighty-nine thousand, seven hundred sixty-three".