61868351 has 4 divisors (see below), whose sum is σ = 65124600. Its totient is φ = 58612104.

The previous prime is 61868327. The next prime is 61868353. The reversal of 61868351 is 15386816.

It is a happy number.

61868351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61868351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61868353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628096 + ... + 1628133.

It is an arithmetic number, because the mean of its divisors is an integer number (16281150).

Almost surely, 2^61868351 is an apocalyptic number.

61868351 is a deficient number, since it is larger than the sum of its proper divisors (3256249).

61868351 is a wasteful number, since it uses less digits than its factorization.

61868351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256248.

The product of its digits is 34560, while the sum is 38.

The square root of 61868351 is about 7865.6437117378. The cubic root of 61868351 is about 395.5088267185.

The spelling of 61868351 in words is "sixty-one million, eight hundred sixty-eight thousand, three hundred fifty-one".