160999990 has 16 divisors (see below), whose sum is σ = 291580848. Its totient is φ = 64004256.

The previous prime is 160999981. The next prime is 160999991. The reversal of 160999990 is 99999061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160999991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47757 + ... + 51016.

It is an arithmetic number, because the mean of its divisors is an integer number (18223803).

Almost surely, 2^160999990 is an apocalyptic number.

160999990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

160999990 is a deficient number, since it is larger than the sum of its proper divisors (130580858).

160999990 is a wasteful number, since it uses less digits than its factorization.

160999990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98943.

The product of its (nonzero) digits is 354294, while the sum is 52.

The square root of 160999990 is about 12688.5771463943. The cubic root of 160999990 is about 544.0121712783.

The spelling of 160999990 in words is "one hundred sixty million, nine hundred ninety-nine thousand, nine hundred ninety".