61350643 has 4 divisors (see below), whose sum is σ = 63329728. Its totient is φ = 59371560.

The previous prime is 61350617. The next prime is 61350661. The reversal of 61350643 is 34605316.

61350643 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-61350643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61350143) 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, 989496 + ... + 989557.

It is an arithmetic number, because the mean of its divisors is an integer number (15832432).

Almost surely, 2^61350643 is an apocalyptic number.

61350643 is a deficient number, since it is larger than the sum of its proper divisors (1979085).

61350643 is a wasteful number, since it uses less digits than its factorization.

61350643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979084.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 61350643 is about 7832.6651275284. The cubic root of 61350643 is about 394.4025428008.

Adding to 61350643 its reverse (34605316), we get a palindrome (95955959).

The spelling of 61350643 in words is "sixty-one million, three hundred fifty thousand, six hundred forty-three".