61836729 has 16 divisors (see below), whose sum is σ = 85536000. Its totient is φ = 39689216.

The previous prime is 61836727. The next prime is 61836739. The reversal of 61836729 is 92763816.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61836729 - 2¹ = 61836727 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (61836721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38272 + ... + 39854.

It is an arithmetic number, because the mean of its divisors is an integer number (5346000).

Almost surely, 2^61836729 is an apocalyptic number.

It is an amenable number.

61836729 is a deficient number, since it is larger than the sum of its proper divisors (23699271).

61836729 is a wasteful number, since it uses less digits than its factorization.

61836729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064.

The product of its digits is 108864, while the sum is 42.

The square root of 61836729 is about 7863.6333205459. The cubic root of 61836729 is about 395.4414314007.

The spelling of 61836729 in words is "sixty-one million, eight hundred thirty-six thousand, seven hundred twenty-nine".