61471129 has 2 divisors, whose sum is σ = 61471130. Its totient is φ = 61471128.

The previous prime is 61471063. The next prime is 61471139. The reversal of 61471129 is 92117416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52229529 + 9241600 = 7227^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 61471129 - 2¹¹ = 61469081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61471129.

It is not a weakly prime, because it can be changed into another prime (61471139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30735564 + 30735565.

It is an arithmetic number, because the mean of its divisors is an integer number (30735565).

Almost surely, 2^61471129 is an apocalyptic number.

It is an amenable number.

61471129 is a deficient number, since it is larger than the sum of its proper divisors (1).

61471129 is an equidigital number, since it uses as much as digits as its factorization.

61471129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 61471129 is about 7840.3526068666. The cubic root of 61471129 is about 394.6605618875.

The spelling of 61471129 in words is "sixty-one million, four hundred seventy-one thousand, one hundred twenty-nine".