61213123 has 8 divisors (see below), whose sum is σ = 64166256. Its totient is φ = 58329600.

The previous prime is 61213091. The next prime is 61213151. The reversal of 61213123 is 32131216.

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 61213123 - 2⁵ = 61213091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61213123.

It is not an unprimeable number, because it can be changed into a prime (61213153) 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, 15598 + ... + 19123.

It is an arithmetic number, because the mean of its divisors is an integer number (8020782).

Almost surely, 2^61213123 is an apocalyptic number.

61213123 is a deficient number, since it is larger than the sum of its proper divisors (2953133).

61213123 is a wasteful number, since it uses less digits than its factorization.

61213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34805.

The product of its digits is 216, while the sum is 19.

The square root of 61213123 is about 7823.8815814147. The cubic root of 61213123 is about 394.1076324770.

Adding to 61213123 its reverse (32131216), we get a palindrome (93344339).

The spelling of 61213123 in words is "sixty-one million, two hundred thirteen thousand, one hundred twenty-three".