61868947 has 8 divisors (see below), whose sum is σ = 71559936. Its totient is φ = 52391112.

The previous prime is 61868941. The next prime is 61868951. The reversal of 61868947 is 74986816.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61868947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61868947.

It is not an unprimeable number, because it can be changed into a prime (61868941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52663 + ... + 53824.

It is an arithmetic number, because the mean of its divisors is an integer number (8944992).

Almost surely, 2^61868947 is an apocalyptic number.

61868947 is a deficient number, since it is larger than the sum of its proper divisors (9690989).

61868947 is a wasteful number, since it uses less digits than its factorization.

61868947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106577.

The product of its digits is 580608, while the sum is 49.

The square root of 61868947 is about 7865.6815979291. The cubic root of 61868947 is about 395.5100967405.

The spelling of 61868947 in words is "sixty-one million, eight hundred sixty-eight thousand, nine hundred forty-seven".