3891106 has 4 divisors (see below), whose sum is σ = 5836662. Its totient is φ = 1945552.

The previous prime is 3891103. The next prime is 3891131. The reversal of 3891106 is 6011983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6011983 = 131 ⋅45893.

It can be written as a sum of positive squares in only one way, i.e., 2873025 + 1018081 = 1695^2 + 1009^2 .

It is not an unprimeable number, because it can be changed into a prime (3891103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972775 + ... + 972778.

Almost surely, 2^3891106 is an apocalyptic number.

3891106 is a deficient number, since it is larger than the sum of its proper divisors (1945556).

3891106 is a wasteful number, since it uses less digits than its factorization.

3891106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945555.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3891106 is about 1972.5886545349. The cubic root of 3891106 is about 157.2863450524.

The spelling of 3891106 in words is "three million, eight hundred ninety-one thousand, one hundred six".