919820849 has 2 divisors, whose sum is σ = 919820850. Its totient is φ = 919820848.

The previous prime is 919820821. The next prime is 919820861. The reversal of 919820849 is 948028919.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 909625600 + 10195249 = 30160^2 + 3193^2 .

It is a cyclic number.

It is not a de Polignac number, because 919820849 - 2⁸ = 919820593 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 919820797 and 919820806.

It is not a weakly prime, because it can be changed into another prime (919820449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459910424 + 459910425.

It is an arithmetic number, because the mean of its divisors is an integer number (459910425).

Almost surely, 2^919820849 is an apocalyptic number.

It is an amenable number.

919820849 is a deficient number, since it is larger than the sum of its proper divisors (1).

919820849 is an equidigital number, since it uses as much as digits as its factorization.

919820849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 919820849 is about 30328.5484156430. The cubic root of 919820849 is about 972.5256915913.

The spelling of 919820849 in words is "nine hundred nineteen million, eight hundred twenty thousand, eight hundred forty-nine".