61843894 has 8 divisors (see below), whose sum is σ = 106018128. Its totient is φ = 26504520.

The previous prime is 61843891. The next prime is 61843919. The reversal of 61843894 is 49834816.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61843894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61843891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208697 + ... + 2208724.

It is an arithmetic number, because the mean of its divisors is an integer number (13252266).

Almost surely, 2^61843894 is an apocalyptic number.

61843894 is a deficient number, since it is larger than the sum of its proper divisors (44174234).

61843894 is a wasteful number, since it uses less digits than its factorization.

61843894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4417430.

The product of its digits is 165888, while the sum is 43.

The square root of 61843894 is about 7864.0888855607. The cubic root of 61843894 is about 395.4567040306.

The spelling of 61843894 in words is "sixty-one million, eight hundred forty-three thousand, eight hundred ninety-four".