161954283 has 4 divisors (see below), whose sum is σ = 215939048. Its totient is φ = 107969520.

The previous prime is 161954281. The next prime is 161954311. The reversal of 161954283 is 382459161.

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

It is not a de Polignac number, because 161954283 - 2¹ = 161954281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161954281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26992378 + ... + 26992383.

It is an arithmetic number, because the mean of its divisors is an integer number (53984762).

Almost surely, 2^161954283 is an apocalyptic number.

161954283 is a deficient number, since it is larger than the sum of its proper divisors (53984765).

161954283 is an equidigital number, since it uses as much as digits as its factorization.

161954283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53984764.

The product of its digits is 51840, while the sum is 39.

The square root of 161954283 is about 12726.1260012621. The cubic root of 161954283 is about 545.0848932090.

The spelling of 161954283 in words is "one hundred sixty-one million, nine hundred fifty-four thousand, two hundred eighty-three".