61683145 has 12 divisors (see below), whose sum is σ = 76665420. Its totient is φ = 47641664.

The previous prime is 61683137. The next prime is 61683151. The reversal of 61683145 is 54138616.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 44944 + 61638201 = 212^2 + 7851^2 .

It is not a de Polignac number, because 61683145 - 2³ = 61683137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61683145.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3130 + ... + 11539.

It is an arithmetic number, because the mean of its divisors is an integer number (6388785).

Almost surely, 2^61683145 is an apocalyptic number.

It is an amenable number.

61683145 is a deficient number, since it is larger than the sum of its proper divisors (14982275).

61683145 is a wasteful number, since it uses less digits than its factorization.

61683145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14732 (or 14703 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 61683145 is about 7853.8617889545. The cubic root of 61683145 is about 395.1137737741.

The spelling of 61683145 in words is "sixty-one million, six hundred eighty-three thousand, one hundred forty-five".