61860947 has 2 divisors, whose sum is σ = 61860948. Its totient is φ = 61860946.

The previous prime is 61860901. The next prime is 61860971. The reversal of 61860947 is 74906816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61860947 - 2⁸ = 61860691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61863947) 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, 30930473 + 30930474.

It is an arithmetic number, because the mean of its divisors is an integer number (30930474).

Almost surely, 2^61860947 is an apocalyptic number.

61860947 is a deficient number, since it is larger than the sum of its proper divisors (1).

61860947 is an equidigital number, since it uses as much as digits as its factorization.

61860947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 61860947 is about 7865.1730432331. The cubic root of 61860947 is about 395.4930487851.

The spelling of 61860947 in words is "sixty-one million, eight hundred sixty thousand, nine hundred forty-seven".