61506673 has 2 divisors, whose sum is σ = 61506674. Its totient is φ = 61506672.

The previous prime is 61506619. The next prime is 61506689. The reversal of 61506673 is 37660516.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34963569 + 26543104 = 5913^2 + 5152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61506673 is a prime.

It is not a weakly prime, because it can be changed into another prime (61506073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30753336 + 30753337.

It is an arithmetic number, because the mean of its divisors is an integer number (30753337).

Almost surely, 2^61506673 is an apocalyptic number.

It is an amenable number.

61506673 is a deficient number, since it is larger than the sum of its proper divisors (1).

61506673 is an equidigital number, since it uses as much as digits as its factorization.

61506673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 61506673 is about 7842.6190140794. The cubic root of 61506673 is about 394.7366144582.

The spelling of 61506673 in words is "sixty-one million, five hundred six thousand, six hundred seventy-three".