918790447 has 2 divisors, whose sum is σ = 918790448. Its totient is φ = 918790446.

The previous prime is 918790423. The next prime is 918790459. The reversal of 918790447 is 744097819.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 918790447 - 2⁷ = 918790319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 918790447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918794447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459395223 + 459395224.

It is an arithmetic number, because the mean of its divisors is an integer number (459395224).

Almost surely, 2^918790447 is an apocalyptic number.

918790447 is a deficient number, since it is larger than the sum of its proper divisors (1).

918790447 is an equidigital number, since it uses as much as digits as its factorization.

918790447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 918790447 is about 30311.5563275791. The cubic root of 918790447 is about 972.1624082267.

The spelling of 918790447 in words is "nine hundred eighteen million, seven hundred ninety thousand, four hundred forty-seven".