61280329 has 6 divisors (see below), whose sum is σ = 67357850. Its totient is φ = 55709280.

The previous prime is 61280321. The next prime is 61280333. The reversal of 61280329 is 92308216.

It can be written as a sum of positive squares in only one way, i.e., 35676729 + 25603600 = 5973^2 + 5060^2 .

It is not a de Polignac number, because 61280329 - 2³ = 61280321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61280329.

It is not an unprimeable number, because it can be changed into a prime (61280321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253104 + ... + 253345.

Almost surely, 2^61280329 is an apocalyptic number.

It is an amenable number.

61280329 is a deficient number, since it is larger than the sum of its proper divisors (6077521).

61280329 is a wasteful number, since it uses less digits than its factorization.

61280329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506471 (or 506460 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 61280329 is about 7828.1753301775. The cubic root of 61280329 is about 394.2518102230.

The spelling of 61280329 in words is "sixty-one million, two hundred eighty thousand, three hundred twenty-nine".