161906914 has 8 divisors (see below), whose sum is σ = 261541980. Its totient is φ = 74726256.

The previous prime is 161906903. The next prime is 161906957. The reversal of 161906914 is 419609161.

It can be written as a sum of positive squares in 2 ways, for example, as 120626289 + 41280625 = 10983^2 + 6425^2 .

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

It is an unprimeable number.

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, 3113569 + ... + 3113620.

Almost surely, 2^161906914 is an apocalyptic number.

161906914 is a deficient number, since it is larger than the sum of its proper divisors (99635066).

161906914 is a wasteful number, since it uses less digits than its factorization.

161906914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6227204.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 161906914 is about 12724.2647724731. The cubic root of 161906914 is about 545.0317451980.

It can be divided in two parts, 16190 and 6914, that added together give a square (23104 = 152²).

The spelling of 161906914 in words is "one hundred sixty-one million, nine hundred six thousand, nine hundred fourteen".