931906 has 8 divisors (see below), whose sum is σ = 1480140. Its totient is φ = 438528.

The previous prime is 931901. The next prime is 931907. The reversal of 931906 is 609139.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 912025 + 19881 = 955^2 + 141^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (931901) by changing a digit.

931906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13671 + ... + 13738.

2⁹³¹⁹⁰⁶ is an apocalyptic number.

931906 is a deficient number, since it is larger than the sum of its proper divisors (548234).

931906 is a wasteful number, since it uses less digits than its factorization.

931906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27428.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 931906 is about 965.3527852552. The cubic root of 931906 is about 97.6766379385.

The spelling of 931906 in words is "nine hundred thirty-one thousand, nine hundred six".