61061947 has 2 divisors, whose sum is σ = 61061948. Its totient is φ = 61061946.

The previous prime is 61061927. The next prime is 61061999. The reversal of 61061947 is 74916016.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61061947 is a prime.

It is a super-2 number, since 2×61061947² = 7457122742861618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61061927) 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, 30530973 + 30530974.

It is an arithmetic number, because the mean of its divisors is an integer number (30530974).

Almost surely, 2^61061947 is an apocalyptic number.

61061947 is a deficient number, since it is larger than the sum of its proper divisors (1).

61061947 is an equidigital number, since it uses as much as digits as its factorization.

61061947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 61061947 is about 7814.2144198889. The cubic root of 61061947 is about 393.7829268845.

The spelling of 61061947 in words is "sixty-one million, sixty-one thousand, nine hundred forty-seven".