61517723 has 2 divisors, whose sum is σ = 61517724. Its totient is φ = 61517722.

The previous prime is 61517719. The next prime is 61517749. The reversal of 61517723 is 32771516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61517723 - 2² = 61517719 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61517723.

It is not a weakly prime, because it can be changed into another prime (61513723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30758861 + 30758862.

It is an arithmetic number, because the mean of its divisors is an integer number (30758862).

Almost surely, 2^61517723 is an apocalyptic number.

61517723 is a deficient number, since it is larger than the sum of its proper divisors (1).

61517723 is an equidigital number, since it uses as much as digits as its factorization.

61517723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 32.

The square root of 61517723 is about 7843.3234664905. The cubic root of 61517723 is about 394.7602518848.

The spelling of 61517723 in words is "sixty-one million, five hundred seventeen thousand, seven hundred twenty-three".