61429409 has 4 divisors (see below), whose sum is σ = 61768980. Its totient is φ = 61089840.

The previous prime is 61429397. The next prime is 61429429. The reversal of 61429409 is 90492416.

61429409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19114384 + 42315025 = 4372^2 + 6505^2 .

It is a cyclic number.

It is not a de Polignac number, because 61429409 - 2⁸ = 61429153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61429429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169514 + ... + 169875.

It is an arithmetic number, because the mean of its divisors is an integer number (15442245).

Almost surely, 2^61429409 is an apocalyptic number.

It is an amenable number.

61429409 is a deficient number, since it is larger than the sum of its proper divisors (339571).

61429409 is a wasteful number, since it uses less digits than its factorization.

61429409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339570.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 61429409 is about 7837.6915606574. The cubic root of 61429409 is about 394.5712572808.

It can be divided in two parts, 6142 and 9409, that added together give a palindrome (15551).

The spelling of 61429409 in words is "sixty-one million, four hundred twenty-nine thousand, four hundred nine".