61612747 has 16 divisors (see below), whose sum is σ = 72230400. Its totient is φ = 52533096.

The previous prime is 61612729. The next prime is 61612753. The reversal of 61612747 is 74721616.

It is a happy number.

61612747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61612747 - 2⁷ = 61612619 is a prime.

It is a super-2 number, since 2×61612747² = 7592261185772018, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61612787) 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 15 ways as a sum of consecutive naturals, for example, 89868 + ... + 90550.

It is an arithmetic number, because the mean of its divisors is an integer number (4514400).

Almost surely, 2^61612747 is an apocalyptic number.

61612747 is a deficient number, since it is larger than the sum of its proper divisors (10617653).

61612747 is an equidigital number, since it uses as much as digits as its factorization.

61612747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 953 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 61612747 is about 7849.3787652272. The cubic root of 61612747 is about 394.9634041832.

The spelling of 61612747 in words is "sixty-one million, six hundred twelve thousand, seven hundred forty-seven".