161287963 has 2 divisors, whose sum is σ = 161287964. Its totient is φ = 161287962.

The previous prime is 161287949. The next prime is 161287967. The reversal of 161287963 is 369782161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161287963 - 2²⁵ = 127733531 is a prime.

It is not a weakly prime, because it can be changed into another prime (161287967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80643981 + 80643982.

It is an arithmetic number, because the mean of its divisors is an integer number (80643982).

Almost surely, 2^161287963 is an apocalyptic number.

161287963 is a deficient number, since it is larger than the sum of its proper divisors (1).

161287963 is an equidigital number, since it uses as much as digits as its factorization.

161287963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 161287963 is about 12699.9198028964. The cubic root of 161287963 is about 544.3363276251.

The spelling of 161287963 in words is "one hundred sixty-one million, two hundred eighty-seven thousand, nine hundred sixty-three".