61429904 has 10 divisors (see below), whose sum is σ = 119020470. Its totient is φ = 30714944.

The previous prime is 61429903. The next prime is 61429909. The reversal of 61429904 is 40992416.

It can be written as a sum of positive squares in only one way, i.e., 45589504 + 15840400 = 6752^2 + 3980^2 .

It is not an unprimeable number, because it can be changed into a prime (61429903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1919669 + ... + 1919700.

It is an arithmetic number, because the mean of its divisors is an integer number (11902047).

Almost surely, 2^61429904 is an apocalyptic number.

It is an amenable number.

61429904 is a deficient number, since it is larger than the sum of its proper divisors (57590566).

61429904 is a wasteful number, since it uses less digits than its factorization.

61429904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3839377 (or 3839371 counting only the distinct ones).

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

The square root of 61429904 is about 7837.7231387693. The cubic root of 61429904 is about 394.5723171003.

The spelling of 61429904 in words is "sixty-one million, four hundred twenty-nine thousand, nine hundred four".