61868387 has 8 divisors (see below), whose sum is σ = 70754400. Its totient is φ = 52994304.

The previous prime is 61868377. The next prime is 61868393. The reversal of 61868387 is 78386816.

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

It is a cyclic number.

It is not a de Polignac number, because 61868387 - 2⁴ = 61868371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61868327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17939 + ... + 21107.

It is an arithmetic number, because the mean of its divisors is an integer number (8844300).

Almost surely, 2^61868387 is an apocalyptic number.

61868387 is a deficient number, since it is larger than the sum of its proper divisors (8886013).

61868387 is a wasteful number, since it uses less digits than its factorization.

61868387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5965.

The product of its digits is 387072, while the sum is 47.

The square root of 61868387 is about 7865.6460001706. The cubic root of 61868387 is about 395.5089034315.

The spelling of 61868387 in words is "sixty-one million, eight hundred sixty-eight thousand, three hundred eighty-seven".