61694643 has 8 divisors (see below), whose sum is σ = 82752768. Its totient is φ = 40883144.

The previous prime is 61694623. The next prime is 61694657. The reversal of 61694643 is 34649616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61694643 - 2⁹ = 61694131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61694623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61071 + ... + 62072.

It is an arithmetic number, because the mean of its divisors is an integer number (10344096).

Almost surely, 2^61694643 is an apocalyptic number.

61694643 is a deficient number, since it is larger than the sum of its proper divisors (21058125).

61694643 is a wasteful number, since it uses less digits than its factorization.

61694643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123313.

The product of its digits is 93312, while the sum is 39.

The square root of 61694643 is about 7854.5937514298. The cubic root of 61694643 is about 395.1383225436.

It can be divided in two parts, 616 and 94643, that added together give a palindrome (95259).

The spelling of 61694643 in words is "sixty-one million, six hundred ninety-four thousand, six hundred forty-three".