919798457 has 2 divisors, whose sum is σ = 919798458. Its totient is φ = 919798456.

The previous prime is 919798441. The next prime is 919798483. The reversal of 919798457 is 754897919.

919798457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723125881 + 196672576 = 26891^2 + 14024^2 .

It is a cyclic number.

It is not a de Polignac number, because 919798457 - 2⁴ = 919798441 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 919798396 and 919798405.

It is not a weakly prime, because it can be changed into another prime (919798487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459899228 + 459899229.

It is an arithmetic number, because the mean of its divisors is an integer number (459899229).

Almost surely, 2^919798457 is an apocalyptic number.

It is an amenable number.

919798457 is a deficient number, since it is larger than the sum of its proper divisors (1).

919798457 is an equidigital number, since it uses as much as digits as its factorization.

919798457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 59.

The square root of 919798457 is about 30328.1792562626. The cubic root of 919798457 is about 972.5177998473.

The spelling of 919798457 in words is "nine hundred nineteen million, seven hundred ninety-eight thousand, four hundred fifty-seven".