7901906 has 8 divisors (see below), whose sum is σ = 12550140. Its totient is φ = 3718528.

The previous prime is 7901899. The next prime is 7901909. The reversal of 7901906 is 6091097.

It can be written as a sum of positive squares in 2 ways, for example, as 7789681 + 112225 = 2791^2 + 335^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7901909) by changing a digit.

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, 116171 + ... + 116238.

Almost surely, 2^7901906 is an apocalyptic number.

7901906 is a deficient number, since it is larger than the sum of its proper divisors (4648234).

7901906 is a wasteful number, since it uses less digits than its factorization.

7901906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232428.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 7901906 is about 2811.0329062464. The cubic root of 7901906 is about 199.1791859297.

The spelling of 7901906 in words is "seven million, nine hundred one thousand, nine hundred six".