61830865 has 4 divisors (see below), whose sum is σ = 74197044. Its totient is φ = 49464688.

The previous prime is 61830863. The next prime is 61830893. The reversal of 61830865 is 56803816.

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 22743361 + 39087504 = 4769^2 + 6252^2 .

It is a cyclic number.

It is not a de Polignac number, because 61830865 - 2¹ = 61830863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61830863) 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 3 ways as a sum of consecutive naturals, for example, 6183082 + ... + 6183091.

It is an arithmetic number, because the mean of its divisors is an integer number (18549261).

Almost surely, 2^61830865 is an apocalyptic number.

It is an amenable number.

61830865 is a deficient number, since it is larger than the sum of its proper divisors (12366179).

61830865 is a wasteful number, since it uses less digits than its factorization.

61830865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12366178.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 61830865 is about 7863.2604560704. The cubic root of 61830865 is about 395.4289310529.

The spelling of 61830865 in words is "sixty-one million, eight hundred thirty thousand, eight hundred sixty-five".