61730747 has 4 divisors (see below), whose sum is σ = 66479280. Its totient is φ = 56982216.

The previous prime is 61730741. The next prime is 61730749. The reversal of 61730747 is 74703716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61730747 - 2⁴ = 61730731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61730741) 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, 2374247 + ... + 2374272.

It is an arithmetic number, because the mean of its divisors is an integer number (16619820).

Almost surely, 2^61730747 is an apocalyptic number.

61730747 is a deficient number, since it is larger than the sum of its proper divisors (4748533).

61730747 is a wasteful number, since it uses less digits than its factorization.

61730747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4748532.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 61730747 is about 7856.8916881932. The cubic root of 61730747 is about 395.2153864579.

The spelling of 61730747 in words is "sixty-one million, seven hundred thirty thousand, seven hundred forty-seven".