61222747 has 2 divisors, whose sum is σ = 61222748. Its totient is φ = 61222746.

The previous prime is 61222703. The next prime is 61222771. The reversal of 61222747 is 74722216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61222747 - 2¹¹ = 61220699 is a prime.

It is not a weakly prime, because it can be changed into another prime (61222547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30611373 + 30611374.

It is an arithmetic number, because the mean of its divisors is an integer number (30611374).

Almost surely, 2^61222747 is an apocalyptic number.

61222747 is a deficient number, since it is larger than the sum of its proper divisors (1).

61222747 is an equidigital number, since it uses as much as digits as its factorization.

61222747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 31.

The square root of 61222747 is about 7824.4965972259. The cubic root of 61222747 is about 394.1282854182.

The spelling of 61222747 in words is "sixty-one million, two hundred twenty-two thousand, seven hundred forty-seven".