916121047 has 2 divisors, whose sum is σ = 916121048. Its totient is φ = 916121046.

The previous prime is 916121033. The next prime is 916121069. The reversal of 916121047 is 740121619.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 916121047 - 2²³ = 907732439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (916101047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458060523 + 458060524.

It is an arithmetic number, because the mean of its divisors is an integer number (458060524).

Almost surely, 2^916121047 is an apocalyptic number.

916121047 is a deficient number, since it is larger than the sum of its proper divisors (1).

916121047 is an equidigital number, since it uses as much as digits as its factorization.

916121047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 916121047 is about 30267.4915875102. The cubic root of 916121047 is about 971.2200070465.

The spelling of 916121047 in words is "nine hundred sixteen million, one hundred twenty-one thousand, forty-seven".