61072117 has 2 divisors, whose sum is σ = 61072118. Its totient is φ = 61072116.

The previous prime is 61072097. The next prime is 61072127. The reversal of 61072117 is 71127016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45279441 + 15792676 = 6729^2 + 3974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61072117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61072091 and 61072100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61072127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30536058 + 30536059.

It is an arithmetic number, because the mean of its divisors is an integer number (30536059).

Almost surely, 2^61072117 is an apocalyptic number.

It is an amenable number.

61072117 is a deficient number, since it is larger than the sum of its proper divisors (1).

61072117 is an equidigital number, since it uses as much as digits as its factorization.

61072117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 61072117 is about 7814.8651299942. The cubic root of 61072117 is about 393.8047874717.

It can be divided in two parts, 610 and 72117, that added together give a palindrome (72727).

The spelling of 61072117 in words is "sixty-one million, seventy-two thousand, one hundred seventeen".