107731906 has 8 divisors (see below), whose sum is σ = 161662140. Its totient is φ = 53844528.

The previous prime is 107731847. The next prime is 107731909. The reversal of 107731906 is 609137701.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 106812225 + 919681 = 10335^2 + 959^2 .

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 (107731909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3441 + ... + 15076.

Almost surely, 2^107731906 is an apocalyptic number.

107731906 is a deficient number, since it is larger than the sum of its proper divisors (53930234).

107731906 is a wasteful number, since it uses less digits than its factorization.

107731906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21428.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 107731906 is about 10379.3981521088. The cubic root of 107731906 is about 475.8259402900.

The spelling of 107731906 in words is "one hundred seven million, seven hundred thirty-one thousand, nine hundred six".