161793963 has 32 divisors (see below), whose sum is σ = 244294400. Its totient is φ = 105815808.

The previous prime is 161793959. The next prime is 161794013. The reversal of 161793963 is 369397161.

It is not a de Polignac number, because 161793963 - 2² = 161793959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161793923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426708 + ... + 427086.

It is an arithmetic number, because the mean of its divisors is an integer number (7634200).

Almost surely, 2^161793963 is an apocalyptic number.

161793963 is a deficient number, since it is larger than the sum of its proper divisors (82500437).

161793963 is a wasteful number, since it uses less digits than its factorization.

161793963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 642 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 161793963 is about 12719.8255884269. The cubic root of 161793963 is about 544.9049723496.

The spelling of 161793963 in words is "one hundred sixty-one million, seven hundred ninety-three thousand, nine hundred sixty-three".