61123313 has 4 divisors (see below), whose sum is σ = 64718820. Its totient is φ = 57527808.

The previous prime is 61123291. The next prime is 61123319. The reversal of 61123313 is 31332116.

It is a happy number.

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 19430464 + 41692849 = 4408^2 + 6457^2 .

It is a cyclic number.

It is not a de Polignac number, because 61123313 - 2²⁰ = 60074737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61123319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1797728 + ... + 1797761.

It is an arithmetic number, because the mean of its divisors is an integer number (16179705).

Almost surely, 2^61123313 is an apocalyptic number.

It is an amenable number.

61123313 is a deficient number, since it is larger than the sum of its proper divisors (3595507).

61123313 is a wasteful number, since it uses less digits than its factorization.

61123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595506.

The product of its digits is 324, while the sum is 20.

The square root of 61123313 is about 7818.1399961884. The cubic root of 61123313 is about 393.9147972976.

Adding to 61123313 its reverse (31332116), we get a palindrome (92455429).

The spelling of 61123313 in words is "sixty-one million, one hundred twenty-three thousand, three hundred thirteen".