161479990 has 24 divisors (see below), whose sum is σ = 338120352. Its totient is φ = 55364400.

The previous prime is 161479979. The next prime is 161479999. The reversal of 161479990 is 99974161.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 161479990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161479999) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 164286 + ... + 165265.

It is an arithmetic number, because the mean of its divisors is an integer number (14088348).

Almost surely, 2^161479990 is an apocalyptic number.

161479990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161479990 is an abundant number, since it is smaller than the sum of its proper divisors (176640362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161479990 is a wasteful number, since it uses less digits than its factorization.

161479990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329572 (or 329565 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 161479990 is about 12707.4777198309. The cubic root of 161479990 is about 544.5522681384.

The spelling of 161479990 in words is "one hundred sixty-one million, four hundred seventy-nine thousand, nine hundred ninety".