61820029 has 8 divisors (see below), whose sum is σ = 62988128. Its totient is φ = 60659280.

The previous prime is 61819997. The next prime is 61820039. The reversal of 61820029 is 92002816.

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 61820029 - 2⁵ = 61819997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61819979 and 61820006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61820039) 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 7 ways as a sum of consecutive naturals, for example, 16894 + ... + 20224.

It is an arithmetic number, because the mean of its divisors is an integer number (7873516).

Almost surely, 2^61820029 is an apocalyptic number.

It is an amenable number.

61820029 is a deficient number, since it is larger than the sum of its proper divisors (1168099).

61820029 is a wasteful number, since it uses less digits than its factorization.

61820029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3675.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 61820029 is about 7862.5713987219. The cubic root of 61820029 is about 395.4058297629.

The spelling of 61820029 in words is "sixty-one million, eight hundred twenty thousand, twenty-nine".