161498329 has 4 divisors (see below), whose sum is σ = 163444176. Its totient is φ = 159552484.

The previous prime is 161498327. The next prime is 161498333. The reversal of 161498329 is 923894161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 923894161 = 137 ⋅6743753.

It is a cyclic number.

It is not a de Polignac number, because 161498329 - 2¹ = 161498327 is a prime.

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 (161498327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972799 + ... + 972964.

It is an arithmetic number, because the mean of its divisors is an integer number (40861044).

Almost surely, 2^161498329 is an apocalyptic number.

It is an amenable number.

161498329 is a deficient number, since it is larger than the sum of its proper divisors (1945847).

161498329 is an equidigital number, since it uses as much as digits as its factorization.

161498329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945846.

The product of its digits is 93312, while the sum is 43.

The square root of 161498329 is about 12708.1992823531. The cubic root of 161498329 is about 544.5728819742.

The spelling of 161498329 in words is "one hundred sixty-one million, four hundred ninety-eight thousand, three hundred twenty-nine".