906172705 has 8 divisors (see below), whose sum is σ = 1087569000. Its totient is φ = 724830336.

The previous prime is 906172667. The next prime is 906172711. The reversal of 906172705 is 507271609.

It can be written as a sum of positive squares in 4 ways, for example, as 203233536 + 702939169 = 14256^2 + 26513^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 906172705 - 2⁷ = 906172577 is a prime.

It is a super-2 number, since 2×906172705² = 1642297942574034050, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 56971 + ... + 71119.

It is an arithmetic number, because the mean of its divisors is an integer number (135946125).

Almost surely, 2^906172705 is an apocalyptic number.

It is an amenable number.

906172705 is a deficient number, since it is larger than the sum of its proper divisors (181396295).

906172705 is a wasteful number, since it uses less digits than its factorization.

906172705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26963.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 906172705 is about 30102.7026195324. The cubic root of 906172705 is about 967.6916467853.

The spelling of 906172705 in words is "nine hundred six million, one hundred seventy-two thousand, seven hundred five".