61783147 has 2 divisors, whose sum is σ = 61783148. Its totient is φ = 61783146.

The previous prime is 61783133. The next prime is 61783157. The reversal of 61783147 is 74138716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61783147 - 2¹⁵ = 61750379 is a prime.

It is not a weakly prime, because it can be changed into another prime (61783157) 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 as a sum of consecutive naturals, namely, 30891573 + 30891574.

It is an arithmetic number, because the mean of its divisors is an integer number (30891574).

Almost surely, 2^61783147 is an apocalyptic number.

61783147 is a deficient number, since it is larger than the sum of its proper divisors (1).

61783147 is an equidigital number, since it uses as much as digits as its factorization.

61783147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 61783147 is about 7860.2256328938. The cubic root of 61783147 is about 395.3271807168.

The spelling of 61783147 in words is "sixty-one million, seven hundred eighty-three thousand, one hundred forty-seven".