61020577 has 2 divisors, whose sum is σ = 61020578. Its totient is φ = 61020576.

The previous prime is 61020559. The next prime is 61020581. The reversal of 61020577 is 77502016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58920976 + 2099601 = 7676^2 + 1449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61020577 is a prime.

It is not a weakly prime, because it can be changed into another prime (61020527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30510288 + 30510289.

It is an arithmetic number, because the mean of its divisors is an integer number (30510289).

Almost surely, 2^61020577 is an apocalyptic number.

It is an amenable number.

61020577 is a deficient number, since it is larger than the sum of its proper divisors (1).

61020577 is an equidigital number, since it uses as much as digits as its factorization.

61020577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 61020577 is about 7811.5668722734. The cubic root of 61020577 is about 393.6939763410.

The spelling of 61020577 in words is "sixty-one million, twenty thousand, five hundred seventy-seven".