61650313 has 8 divisors (see below), whose sum is σ = 65345832. Its totient is φ = 57962496.

The previous prime is 61650293. The next prime is 61650319. The reversal of 61650313 is 31305616.

It can be written as a sum of positive squares in 4 ways, for example, as 16867449 + 44782864 = 4107^2 + 6692^2 .

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 61650313 - 2⁹ = 61649801 is a prime.

It is a super-3 number, since 3×61650313³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61650319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27781 + ... + 29917.

It is an arithmetic number, because the mean of its divisors is an integer number (8168229).

Almost surely, 2^61650313 is an apocalyptic number.

It is an amenable number.

61650313 is a deficient number, since it is larger than the sum of its proper divisors (3695519).

61650313 is a wasteful number, since it uses less digits than its factorization.

61650313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 61650313 is about 7851.7713288149. The cubic root of 61650313 is about 395.0436591169.

Adding to 61650313 its reverse (31305616), we get a palindrome (92955929).

The spelling of 61650313 in words is "sixty-one million, six hundred fifty thousand, three hundred thirteen".