61338647 has 4 divisors (see below), whose sum is σ = 61557216. Its totient is φ = 61120080.

The previous prime is 61338643. The next prime is 61338653. The reversal of 61338647 is 74683316.

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 61338647 - 2² = 61338643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61338647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61338643) 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, 108863 + ... + 109424.

It is an arithmetic number, because the mean of its divisors is an integer number (15389304).

Almost surely, 2^61338647 is an apocalyptic number.

61338647 is a deficient number, since it is larger than the sum of its proper divisors (218569).

61338647 is a wasteful number, since it uses less digits than its factorization.

61338647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218568.

The product of its digits is 72576, while the sum is 38.

The square root of 61338647 is about 7831.8993226420. The cubic root of 61338647 is about 394.3768350490.

The spelling of 61338647 in words is "sixty-one million, three hundred thirty-eight thousand, six hundred forty-seven".