61687694 has 8 divisors (see below), whose sum is σ = 92753640. Its totient is φ = 30769816.

The previous prime is 61687693. The next prime is 61687697. The reversal of 61687694 is 49678616.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61687693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35969 + ... + 37644.

It is an arithmetic number, because the mean of its divisors is an integer number (11594205).

Almost surely, 2^61687694 is an apocalyptic number.

61687694 is a deficient number, since it is larger than the sum of its proper divisors (31065946).

61687694 is a wasteful number, since it uses less digits than its factorization.

61687694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74034.

The product of its digits is 435456, while the sum is 47.

The square root of 61687694 is about 7854.1513863689. The cubic root of 61687694 is about 395.1234864673.

The spelling of 61687694 in words is "sixty-one million, six hundred eighty-seven thousand, six hundred ninety-four".