61006919 has 4 divisors (see below), whose sum is σ = 61692480. Its totient is φ = 60321360.

The previous prime is 61006873. The next prime is 61006927. The reversal of 61006919 is 91960016.

It is a happy number.

61006919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-61006919 is a prime.

It is a super-2 number, since 2×61006919² = 7443688331745122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61006949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342647 + ... + 342824.

It is an arithmetic number, because the mean of its divisors is an integer number (15423120).

Almost surely, 2^61006919 is an apocalyptic number.

61006919 is a deficient number, since it is larger than the sum of its proper divisors (685561).

61006919 is an equidigital number, since it uses as much as digits as its factorization.

61006919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685560.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 61006919 is about 7810.6926069331. The cubic root of 61006919 is about 393.6646011486.

The spelling of 61006919 in words is "sixty-one million, six thousand, nine hundred nineteen".