61889105 has 8 divisors (see below), whose sum is σ = 74445864. Its totient is φ = 49392000.

The previous prime is 61889101. The next prime is 61889119. The reversal of 61889105 is 50198816.

It can be written as a sum of positive squares in 4 ways, for example, as 4068289 + 57820816 = 2017^2 + 7604^2 .

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

It is not a de Polignac number, because 61889105 - 2² = 61889101 is a prime.

It is a super-2 number, since 2×61889105² = 7660522635402050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61889101) 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, 12596 + ... + 16805.

It is an arithmetic number, because the mean of its divisors is an integer number (9305733).

Almost surely, 2^61889105 is an apocalyptic number.

It is an amenable number.

61889105 is a deficient number, since it is larger than the sum of its proper divisors (12556759).

61889105 is a wasteful number, since it uses less digits than its factorization.

61889105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29827.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 61889105 is about 7866.9628828411. The cubic root of 61889105 is about 395.5530468105.

The spelling of 61889105 in words is "sixty-one million, eight hundred eighty-nine thousand, one hundred five".