906149817 has 12 divisors (see below), whose sum is σ = 1309151844. Its totient is φ = 603975840.

The previous prime is 906149779. The next prime is 906149819. The reversal of 906149817 is 718941609.

It is a happy number.

906149817 is a `hidden beast` number, since 90 + 61 + 498 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32592681 + 873557136 = 5709^2 + 29556^2 .

It is not a de Polignac number, because 906149817 - 2¹⁴ = 906133433 is a prime.

It is a super-2 number, since 2×906149817² = 1642214981698266978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (906149819) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 64267 + ... + 77087.

It is an arithmetic number, because the mean of its divisors is an integer number (109095987).

Almost surely, 2^906149817 is an apocalyptic number.

It is an amenable number.

906149817 is a deficient number, since it is larger than the sum of its proper divisors (403002027).

906149817 is a wasteful number, since it uses less digits than its factorization.

906149817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20680 (or 20677 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 906149817 is about 30102.3224519305. The cubic root of 906149817 is about 967.6834994374.

The spelling of 906149817 in words is "nine hundred six million, one hundred forty-nine thousand, eight hundred seventeen".