613950961 has 4 divisors (see below), whose sum is σ = 661177972. Its totient is φ = 566723952.

The previous prime is 613950941. The next prime is 613950977. The reversal of 613950961 is 169059316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 369216225 + 244734736 = 19215^2 + 15644^2 .

It is a cyclic number.

It is not a de Polignac number, because 613950961 - 2⁵ = 613950929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (613950901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23613486 + ... + 23613511.

It is an arithmetic number, because the mean of its divisors is an integer number (165294493).

Almost surely, 2^613950961 is an apocalyptic number.

It is an amenable number.

613950961 is a deficient number, since it is larger than the sum of its proper divisors (47227011).

613950961 is a wasteful number, since it uses less digits than its factorization.

613950961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47227010.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 613950961 is about 24778.0338404806. The cubic root of 613950961 is about 849.9196976041.

The spelling of 613950961 in words is "six hundred thirteen million, nine hundred fifty thousand, nine hundred sixty-one".