161434705 has 4 divisors (see below), whose sum is σ = 193721652. Its totient is φ = 129147760.

The previous prime is 161434699. The next prime is 161434709. The reversal of 161434705 is 507434161.

161434705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 115412049 + 46022656 = 10743^2 + 6784^2 .

It is not a de Polignac number, because 161434705 - 2¹⁹ = 160910417 is a prime.

It is a super-2 number, since 2×161434705² = 52122327956874050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161434709) 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, 16143466 + ... + 16143475.

It is an arithmetic number, because the mean of its divisors is an integer number (48430413).

Almost surely, 2^161434705 is an apocalyptic number.

It is an amenable number.

161434705 is a deficient number, since it is larger than the sum of its proper divisors (32286947).

161434705 is an equidigital number, since it uses as much as digits as its factorization.

161434705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32286946.

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

The square root of 161434705 is about 12705.6957700080. The cubic root of 161434705 is about 544.5013591372.

Adding to 161434705 its reverse (507434161), we get a palindrome (668868866).

The spelling of 161434705 in words is "one hundred sixty-one million, four hundred thirty-four thousand, seven hundred five".