61077917 has 2 divisors, whose sum is σ = 61077918. Its totient is φ = 61077916.

The previous prime is 61077911. The next prime is 61077943. The reversal of 61077917 is 71977016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61058596 + 19321 = 7814^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 61077917 - 2⁶ = 61077853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61077911) 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, 30538958 + 30538959.

It is an arithmetic number, because the mean of its divisors is an integer number (30538959).

Almost surely, 2^61077917 is an apocalyptic number.

It is an amenable number.

61077917 is a deficient number, since it is larger than the sum of its proper divisors (1).

61077917 is an equidigital number, since it uses as much as digits as its factorization.

61077917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522, while the sum is 38.

The square root of 61077917 is about 7815.2362088423. The cubic root of 61077917 is about 393.8172535832.

The spelling of 61077917 in words is "sixty-one million, seventy-seven thousand, nine hundred seventeen".