61398759 has 8 divisors (see below), whose sum is σ = 81932272. Its totient is φ = 40898880.

The previous prime is 61398749. The next prime is 61398773. The reversal of 61398759 is 95789316.

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

It is not a de Polignac number, because 61398759 - 2²³ = 53010151 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 (61398739) 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 7 ways as a sum of consecutive naturals, for example, 3784 + ... + 11709.

It is an arithmetic number, because the mean of its divisors is an integer number (10241534).

Almost surely, 2^61398759 is an apocalyptic number.

61398759 is a deficient number, since it is larger than the sum of its proper divisors (20533513).

61398759 is a wasteful number, since it uses less digits than its factorization.

61398759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16817.

The product of its digits is 408240, while the sum is 48.

The square root of 61398759 is about 7835.7360215873. The cubic root of 61398759 is about 394.5056230233.

The spelling of 61398759 in words is "sixty-one million, three hundred ninety-eight thousand, seven hundred fifty-nine".