161054437 has 4 divisors (see below), whose sum is σ = 164982636. Its totient is φ = 157126240.

The previous prime is 161054423. The next prime is 161054449. The reversal of 161054437 is 734450161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 734450161 = 89 ⋅8252249.

It can be written as a sum of positive squares in 2 ways, for example, as 77898276 + 83156161 = 8826^2 + 9119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161054437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161054399 and 161054408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161054407) 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, 1964038 + ... + 1964119.

It is an arithmetic number, because the mean of its divisors is an integer number (41245659).

Almost surely, 2^161054437 is an apocalyptic number.

It is an amenable number.

161054437 is a deficient number, since it is larger than the sum of its proper divisors (3928199).

161054437 is an equidigital number, since it uses as much as digits as its factorization.

161054437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928198.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 161054437 is about 12690.7224774636. The cubic root of 161054437 is about 544.0734890717.

The spelling of 161054437 in words is "one hundred sixty-one million, fifty-four thousand, four hundred thirty-seven".