61279385 has 4 divisors (see below), whose sum is σ = 73535268. Its totient is φ = 49023504.

The previous prime is 61279381. The next prime is 61279403. The reversal of 61279385 is 58397216.

61279385 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 can be written as a sum of positive squares in 2 ways, for example, as 14055001 + 47224384 = 3749^2 + 6872^2 .

It is a cyclic number.

It is not a de Polignac number, because 61279385 - 2² = 61279381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61279381) 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, 6127934 + ... + 6127943.

It is an arithmetic number, because the mean of its divisors is an integer number (18383817).

Almost surely, 2^61279385 is an apocalyptic number.

It is an amenable number.

61279385 is a deficient number, since it is larger than the sum of its proper divisors (12255883).

61279385 is a wasteful number, since it uses less digits than its factorization.

61279385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12255882.

The product of its digits is 90720, while the sum is 41.

The square root of 61279385 is about 7828.1150349238. The cubic root of 61279385 is about 394.2497857799.

It can be divided in two parts, 612 and 79385, that added together give a palindrome (79997).

The spelling of 61279385 in words is "sixty-one million, two hundred seventy-nine thousand, three hundred eighty-five".