61145677 has 2 divisors, whose sum is σ = 61145678. Its totient is φ = 61145676.

The previous prime is 61145611. The next prime is 61145723. The reversal of 61145677 is 77654116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61011721 + 133956 = 7811^2 + 366^2 .

It is a cyclic number.

It is not a de Polignac number, because 61145677 - 2¹⁹ = 60621389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61145177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30572838 + 30572839.

It is an arithmetic number, because the mean of its divisors is an integer number (30572839).

Almost surely, 2^61145677 is an apocalyptic number.

It is an amenable number.

61145677 is a deficient number, since it is larger than the sum of its proper divisors (1).

61145677 is an equidigital number, since it uses as much as digits as its factorization.

61145677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 61145677 is about 7819.5701288498. The cubic root of 61145677 is about 393.9628337227.

The spelling of 61145677 in words is "sixty-one million, one hundred forty-five thousand, six hundred seventy-seven".