61573147 has 2 divisors, whose sum is σ = 61573148. Its totient is φ = 61573146.

The previous prime is 61573111. The next prime is 61573151. The reversal of 61573147 is 74137516.

61573147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61573147 is a prime.

It is not a weakly prime, because it can be changed into another prime (61573747) 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 as a sum of consecutive naturals, namely, 30786573 + 30786574.

It is an arithmetic number, because the mean of its divisors is an integer number (30786574).

Almost surely, 2^61573147 is an apocalyptic number.

61573147 is a deficient number, since it is larger than the sum of its proper divisors (1).

61573147 is an equidigital number, since it uses as much as digits as its factorization.

61573147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 34.

The square root of 61573147 is about 7846.8558671611. The cubic root of 61573147 is about 394.8787685430.

The spelling of 61573147 in words is "sixty-one million, five hundred seventy-three thousand, one hundred forty-seven".