61379729 has 8 divisors (see below), whose sum is σ = 61871040. Its totient is φ = 60890896.

The previous prime is 61379723. The next prime is 61379743. The reversal of 61379729 is 92797316.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61379729 - 2¹⁶ = 61314193 is a prime.

It is a super-3 number, since 3×61379729³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61379729.

It is not an unprimeable number, because it can be changed into a prime (61379723) 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 in 7 ways as a sum of consecutive naturals, for example, 109919 + ... + 110475.

It is an arithmetic number, because the mean of its divisors is an integer number (7733880).

Almost surely, 2^61379729 is an apocalyptic number.

It is an amenable number.

61379729 is a deficient number, since it is larger than the sum of its proper divisors (491311).

61379729 is a wasteful number, since it uses less digits than its factorization.

61379729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239.

The product of its digits is 142884, while the sum is 44.

The square root of 61379729 is about 7834.5216190907. The cubic root of 61379729 is about 394.4648609738.

The spelling of 61379729 in words is "sixty-one million, three hundred seventy-nine thousand, seven hundred twenty-nine".