161969530 has 16 divisors (see below), whose sum is σ = 291755520. Its totient is φ = 64741072.

The previous prime is 161969501. The next prime is 161969569. The reversal of 161969530 is 35969161.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11031 + ... + 21109.

It is an arithmetic number, because the mean of its divisors is an integer number (18234720).

Almost surely, 2^161969530 is an apocalyptic number.

161969530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161969530 is a deficient number, since it is larger than the sum of its proper divisors (129785990).

161969530 is a wasteful number, since it uses less digits than its factorization.

161969530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11693.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 161969530 is about 12726.7250304232. The cubic root of 161969530 is about 545.1019981360.

The spelling of 161969530 in words is "one hundred sixty-one million, nine hundred sixty-nine thousand, five hundred thirty".