61105807 has 4 divisors (see below), whose sum is σ = 69835216. Its totient is φ = 52376400.

The previous prime is 61105777. The next prime is 61105817. The reversal of 61105807 is 70850116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61105807 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 (61105817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4364694 + ... + 4364707.

It is an arithmetic number, because the mean of its divisors is an integer number (17458804).

Almost surely, 2^61105807 is an apocalyptic number.

61105807 is a deficient number, since it is larger than the sum of its proper divisors (8729409).

61105807 is an equidigital number, since it uses as much as digits as its factorization.

61105807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8729408.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 61105807 is about 7817.0203402575. The cubic root of 61105807 is about 393.8771873659.

The spelling of 61105807 in words is "sixty-one million, one hundred five thousand, eight hundred seven".