4091312906 has 4 divisors (see below), whose sum is σ = 6136969362. Its totient is φ = 2045656452.

The previous prime is 4091312903. The next prime is 4091312923. The reversal of 4091312906 is 6092131904.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3719170225 + 372142681 = 60985^2 + 19291^2 .

It is not an unprimeable number, because it can be changed into a prime (4091312903) 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 as a sum of consecutive naturals, namely, 1022828225 + ... + 1022828228.

Almost surely, 2^4091312906 is an apocalyptic number.

4091312906 is a deficient number, since it is larger than the sum of its proper divisors (2045656456).

4091312906 is a wasteful number, since it uses less digits than its factorization.

4091312906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045656455.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 4091312906 is about 63963.3715965630. The cubic root of 4091312906 is about 1599.3894683637.

The spelling of 4091312906 in words is "four billion, ninety-one million, three hundred twelve thousand, nine hundred six".