61894759 has 4 divisors (see below), whose sum is σ = 63334216. Its totient is φ = 60455304.

The previous prime is 61894741. The next prime is 61894823. The reversal of 61894759 is 95749816.

61894759 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 not a de Polignac number, because 61894759 - 2⁹ = 61894247 is a prime.

It is a super-2 number, since 2×61894759² = 7661922383336162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61814759) 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, 719664 + ... + 719749.

It is an arithmetic number, because the mean of its divisors is an integer number (15833554).

Almost surely, 2^61894759 is an apocalyptic number.

61894759 is a deficient number, since it is larger than the sum of its proper divisors (1439457).

61894759 is a wasteful number, since it uses less digits than its factorization.

61894759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439456.

The product of its digits is 544320, while the sum is 49.

The square root of 61894759 is about 7867.3222255098. The cubic root of 61894759 is about 395.5650919506.

The spelling of 61894759 in words is "sixty-one million, eight hundred ninety-four thousand, seven hundred fifty-nine".