161398235 has 8 divisors (see below), whose sum is σ = 197798976. Its totient is φ = 126371200.

The previous prime is 161398201. The next prime is 161398249. The reversal of 161398235 is 532893161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161398235 - 2⁸ = 161397979 is a prime.

It is a super-2 number, since 2×161398235² = 52098780522230450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343166 + ... + 343635.

It is an arithmetic number, because the mean of its divisors is an integer number (24724872).

Almost surely, 2^161398235 is an apocalyptic number.

161398235 is a deficient number, since it is larger than the sum of its proper divisors (36400741).

161398235 is an equidigital number, since it uses as much as digits as its factorization.

161398235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686853.

The product of its digits is 38880, while the sum is 38.

The square root of 161398235 is about 12704.2605058303. The cubic root of 161398235 is about 544.4603529604.

The spelling of 161398235 in words is "one hundred sixty-one million, three hundred ninety-eight thousand, two hundred thirty-five".