840302977 has 2 divisors, whose sum is σ = 840302978. Its totient is φ = 840302976.

The previous prime is 840302971. The next prime is 840303001. The reversal of 840302977 is 779203048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 698597761 + 141705216 = 26431^2 + 11904^2 .

It is a cyclic number.

It is not a de Polignac number, because 840302977 - 2¹⁹ = 839778689 is a prime.

It is a super-2 number, since 2×840302977² = 1412218186310125058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (840302971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420151488 + 420151489.

It is an arithmetic number, because the mean of its divisors is an integer number (420151489).

Almost surely, 2^840302977 is an apocalyptic number.

It is an amenable number.

840302977 is a deficient number, since it is larger than the sum of its proper divisors (1).

840302977 is an equidigital number, since it uses as much as digits as its factorization.

840302977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 840302977 is about 28987.9798709741. The cubic root of 840302977 is about 943.6522231231.

The spelling of 840302977 in words is "eight hundred forty million, three hundred two thousand, nine hundred seventy-seven".