161963 has 4 divisors (see below), whose sum is σ = 163200. Its totient is φ = 160728.

The previous prime is 161957. The next prime is 161969. The reversal of 161963 is 369161.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (161957) and next prime (161969).

It is a cyclic number.

It is not a de Polignac number, because 161963 - 2⁴ = 161947 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (161969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395 + ... + 692.

It is an arithmetic number, because the mean of its divisors is an integer number (40800).

2¹⁶¹⁹⁶³ is an apocalyptic number.

161963 is a deficient number, since it is larger than the sum of its proper divisors (1237).

161963 is a wasteful number, since it uses less digits than its factorization.

161963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 972, while the sum is 26.

The square root of 161963 is about 402.4462697057. The cubic root of 161963 is about 54.5094672553.

The spelling of 161963 in words is "one hundred sixty-one thousand, nine hundred sixty-three".