61964129 has 2 divisors, whose sum is σ = 61964130. Its totient is φ = 61964128.

The previous prime is 61964117. The next prime is 61964143. The reversal of 61964129 is 92146916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 7573504 = 7375^2 + 2752^2 .

It is a cyclic number.

It is not a de Polignac number, because 61964129 - 2⁴ = 61964113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61964092 and 61964101.

It is not a weakly prime, because it can be changed into another prime (61961129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30982064 + 30982065.

It is an arithmetic number, because the mean of its divisors is an integer number (30982065).

Almost surely, 2^61964129 is an apocalyptic number.

It is an amenable number.

61964129 is a deficient number, since it is larger than the sum of its proper divisors (1).

61964129 is an equidigital number, since it uses as much as digits as its factorization.

61964129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 61964129 is about 7871.7297336735. The cubic root of 61964129 is about 395.7128163879.

The spelling of 61964129 in words is "sixty-one million, nine hundred sixty-four thousand, one hundred twenty-nine".