3991154 has 8 divisors (see below), whose sum is σ = 6193260. Its totient is φ = 1926736.

The previous prime is 3991139. The next prime is 3991181. The reversal of 3991154 is 4511993.

It can be written as a sum of positive squares in 2 ways, for example, as 3508129 + 483025 = 1873^2 + 695^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 3991154.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 34349 + ... + 34464.

Almost surely, 2^3991154 is an apocalyptic number.

3991154 is a deficient number, since it is larger than the sum of its proper divisors (2202106).

3991154 is a wasteful number, since it uses less digits than its factorization.

3991154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68844.

The product of its digits is 4860, while the sum is 32.

The square root of 3991154 is about 1997.7872759631. The cubic root of 3991154 is about 158.6230009148.

The spelling of 3991154 in words is "three million, nine hundred ninety-one thousand, one hundred fifty-four".