131706705 has 16 divisors (see below), whose sum is σ = 226941120. Its totient is φ = 64840128.

The previous prime is 131706683. The next prime is 131706733. The reversal of 131706705 is 507607131.

It is not a de Polignac number, because 131706705 - 2⁷ = 131706577 is a prime.

It is a super-2 number, since 2×131706705² = 34693312283914050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337515 + ... + 337904.

It is an arithmetic number, because the mean of its divisors is an integer number (14183820).

Almost surely, 2^131706705 is an apocalyptic number.

131706705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131706705 is a deficient number, since it is larger than the sum of its proper divisors (95234415).

131706705 is a wasteful number, since it uses less digits than its factorization.

131706705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675440.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 131706705 is about 11476.3541684631. The cubic root of 131706705 is about 508.7869478365.

The spelling of 131706705 in words is "one hundred thirty-one million, seven hundred six thousand, seven hundred five".