61308073 has 2 divisors, whose sum is σ = 61308074. Its totient is φ = 61308072.

The previous prime is 61308053. The next prime is 61308077. The reversal of 61308073 is 37080316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51151104 + 10156969 = 7152^2 + 3187^2 .

It is a cyclic number.

It is not a de Polignac number, because 61308073 - 2¹⁷ = 61177001 is a prime.

It is equal to p_3635083 and since 61308073 and 3635083 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (61308077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30654036 + 30654037.

It is an arithmetic number, because the mean of its divisors is an integer number (30654037).

Almost surely, 2^61308073 is an apocalyptic number.

It is an amenable number.

61308073 is a deficient number, since it is larger than the sum of its proper divisors (1).

61308073 is an equidigital number, since it uses as much as digits as its factorization.

61308073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 61308073 is about 7829.9471901157. The cubic root of 61308073 is about 394.3112989807.

Adding to 61308073 its reverse (37080316), we get a palindrome (98388389).

The spelling of 61308073 in words is "sixty-one million, three hundred eight thousand, seventy-three".