61282729 has 2 divisors, whose sum is σ = 61282730. Its totient is φ = 61282728.

The previous prime is 61282721. The next prime is 61282763. The reversal of 61282729 is 92728216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 5631129 = 7460^2 + 2373^2 .

It is a cyclic number.

It is not a de Polignac number, because 61282729 - 2³ = 61282721 is a prime.

It is not a weakly prime, because it can be changed into another prime (61282721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30641364 + 30641365.

It is an arithmetic number, because the mean of its divisors is an integer number (30641365).

Almost surely, 2^61282729 is an apocalyptic number.

It is an amenable number.

61282729 is a deficient number, since it is larger than the sum of its proper divisors (1).

61282729 is an equidigital number, since it uses as much as digits as its factorization.

61282729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 61282729 is about 7828.3286211043. The cubic root of 61282729 is about 394.2569570186.

The spelling of 61282729 in words is "sixty-one million, two hundred eighty-two thousand, seven hundred twenty-nine".