61944805 has 8 divisors (see below), whose sum is σ = 80051832. Its totient is φ = 45743808.

The previous prime is 61944803. The next prime is 61944859. The reversal of 61944805 is 50844916.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4397409 + 57547396 = 2097^2 + 7586^2 .

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 61944805 - 2¹ = 61944803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61944803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476434 + ... + 476563.

It is an arithmetic number, because the mean of its divisors is an integer number (10006479).

Almost surely, 2^61944805 is an apocalyptic number.

61944805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61944805 is a deficient number, since it is larger than the sum of its proper divisors (18107027).

61944805 is a wasteful number, since it uses less digits than its factorization.

61944805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953015.

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

The square root of 61944805 is about 7870.5022076104. The cubic root of 61944805 is about 395.6716767284.

The spelling of 61944805 in words is "sixty-one million, nine hundred forty-four thousand, eight hundred five".