61331077 has 2 divisors, whose sum is σ = 61331078. Its totient is φ = 61331076.

The previous prime is 61330999. The next prime is 61331093. The reversal of 61331077 is 77013316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36590401 + 24740676 = 6049^2 + 4974^2 .

It is a cyclic number.

It is not a de Polignac number, because 61331077 - 2¹¹ = 61329029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61335077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30665538 + 30665539.

It is an arithmetic number, because the mean of its divisors is an integer number (30665539).

Almost surely, 2^61331077 is an apocalyptic number.

It is an amenable number.

61331077 is a deficient number, since it is larger than the sum of its proper divisors (1).

61331077 is an equidigital number, since it uses as much as digits as its factorization.

61331077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 61331077 is about 7831.4160277692. The cubic root of 61331077 is about 394.3606106097.

The spelling of 61331077 in words is "sixty-one million, three hundred thirty-one thousand, seventy-seven".