617541949 has 8 divisors (see below), whose sum is σ = 659656440. Its totient is φ = 576070656.

The previous prime is 617541943. The next prime is 617541961. The reversal of 617541949 is 949145716.

It can be written as a sum of positive squares in 4 ways, for example, as 128822500 + 488719449 = 11350^2 + 22107^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617541949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 617541899 and 617541908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617541943) 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, 158814 + ... + 162655.

It is an arithmetic number, because the mean of its divisors is an integer number (82457055).

Almost surely, 2^617541949 is an apocalyptic number.

It is an amenable number.

617541949 is a deficient number, since it is larger than the sum of its proper divisors (42114491).

617541949 is a wasteful number, since it uses less digits than its factorization.

617541949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321599.

The product of its digits is 272160, while the sum is 46.

The square root of 617541949 is about 24850.3913248866. The cubic root of 617541949 is about 851.5735323155.

The spelling of 617541949 in words is "six hundred seventeen million, five hundred forty-one thousand, nine hundred forty-nine".