61689694 has 16 divisors (see below), whose sum is σ = 106260480. Its totient is φ = 26564760.

The previous prime is 61689679. The next prime is 61689697. The reversal of 61689694 is 49698616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61689697) 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 7 ways as a sum of consecutive naturals, for example, 73374 + ... + 74209.

It is an arithmetic number, because the mean of its divisors is an integer number (6641280).

Almost surely, 2^61689694 is an apocalyptic number.

61689694 is a deficient number, since it is larger than the sum of its proper divisors (44570786).

61689694 is a wasteful number, since it uses less digits than its factorization.

61689694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147615.

The product of its digits is 559872, while the sum is 49.

The square root of 61689694 is about 7854.2787065395. The cubic root of 61689694 is about 395.1277565703.

The spelling of 61689694 in words is "sixty-one million, six hundred eighty-nine thousand, six hundred ninety-four".