61885129 has 2 divisors, whose sum is σ = 61885130. Its totient is φ = 61885128.

The previous prime is 61885123. The next prime is 61885139. The reversal of 61885129 is 92158816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51093904 + 10791225 = 7148^2 + 3285^2 .

It is a cyclic number.

It is not a de Polignac number, because 61885129 - 2⁵ = 61885097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61885091 and 61885100.

It is not a weakly prime, because it can be changed into another prime (61885123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30942564 + 30942565.

It is an arithmetic number, because the mean of its divisors is an integer number (30942565).

Almost surely, 2^61885129 is an apocalyptic number.

It is an amenable number.

61885129 is a deficient number, since it is larger than the sum of its proper divisors (1).

61885129 is an equidigital number, since it uses as much as digits as its factorization.

61885129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 40.

The square root of 61885129 is about 7866.7101764333. The cubic root of 61885129 is about 395.5445760003.

The spelling of 61885129 in words is "sixty-one million, eight hundred eighty-five thousand, one hundred twenty-nine".