912098821 has 2 divisors, whose sum is σ = 912098822. Its totient is φ = 912098820.

The previous prime is 912098777. The next prime is 912098827. The reversal of 912098821 is 128890219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 744525796 + 167573025 = 27286^2 + 12945^2 .

It is a cyclic number.

It is not a de Polignac number, because 912098821 - 2²¹ = 910001669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (912098827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456049410 + 456049411.

It is an arithmetic number, because the mean of its divisors is an integer number (456049411).

Almost surely, 2^912098821 is an apocalyptic number.

It is an amenable number.

912098821 is a deficient number, since it is larger than the sum of its proper divisors (1).

912098821 is an equidigital number, since it uses as much as digits as its factorization.

912098821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 912098821 is about 30200.9738419144. The cubic root of 912098821 is about 969.7965425122.

The spelling of 912098821 in words is "nine hundred twelve million, ninety-eight thousand, eight hundred twenty-one".