61389693 has 6 divisors (see below), whose sum is σ = 88674014. Its totient is φ = 40926456.

The previous prime is 61389659. The next prime is 61389707. The reversal of 61389693 is 39698316.

It can be written as a sum of positive squares in only one way, i.e., 53538489 + 7851204 = 7317^2 + 2802^2 .

It is not a de Polignac number, because 61389693 - 2¹⁰ = 61388669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61389793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3410530 + ... + 3410547.

Almost surely, 2^61389693 is an apocalyptic number.

It is an amenable number.

61389693 is a deficient number, since it is larger than the sum of its proper divisors (27284321).

61389693 is a wasteful number, since it uses less digits than its factorization.

61389693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6821083 (or 6821080 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 61389693 is about 7835.1574968216. The cubic root of 61389693 is about 394.4862048022.

The spelling of 61389693 in words is "sixty-one million, three hundred eighty-nine thousand, six hundred ninety-three".