61304857 has 4 divisors (see below), whose sum is σ = 61559476. Its totient is φ = 61050240.

The previous prime is 61304843. The next prime is 61304861. The reversal of 61304857 is 75840316.

61304857 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 56010256 + 5294601 = 7484^2 + 2301^2 .

It is a cyclic number.

It is not a de Polignac number, because 61304857 - 2¹¹ = 61302809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61304657) 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, 126948 + ... + 127429.

It is an arithmetic number, because the mean of its divisors is an integer number (15389869).

Almost surely, 2^61304857 is an apocalyptic number.

It is an amenable number.

61304857 is a deficient number, since it is larger than the sum of its proper divisors (254619).

61304857 is a wasteful number, since it uses less digits than its factorization.

61304857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254618.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 61304857 is about 7829.7418220526. The cubic root of 61304857 is about 394.3044041448.

The spelling of 61304857 in words is "sixty-one million, three hundred four thousand, eight hundred fifty-seven".