617540949 has 8 divisors (see below), whose sum is σ = 914875520. Its totient is φ = 411693948.

The previous prime is 617540947. The next prime is 617540951. The reversal of 617540949 is 949045716.

617540949 is a `hidden beast` number, since 6 + 17 + 540 + 94 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (617540947) and next prime (617540951).

It is not a de Polignac number, because 617540949 - 2¹ = 617540947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617540947) 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 7 ways as a sum of consecutive naturals, for example, 11435917 + ... + 11435970.

It is an arithmetic number, because the mean of its divisors is an integer number (114359440).

Almost surely, 2^617540949 is an apocalyptic number.

It is an amenable number.

617540949 is a deficient number, since it is larger than the sum of its proper divisors (297334571).

617540949 is a wasteful number, since it uses less digits than its factorization.

617540949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22871896 (or 22871890 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 617540949 is about 24850.3712044710. The cubic root of 617540949 is about 851.5730726577.

The spelling of 617540949 in words is "six hundred seventeen million, five hundred forty thousand, nine hundred forty-nine".