8420319377 has 2 divisors, whose sum is σ = 8420319378. Its totient is φ = 8420319376.

The previous prime is 8420319353. The next prime is 8420319409. The reversal of 8420319377 is 7739130248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6267730561 + 2152588816 = 79169^2 + 46396^2 .

It is a cyclic number.

It is not a de Polignac number, because 8420319377 - 2¹⁰ = 8420318353 is a prime.

It is not a weakly prime, because it can be changed into another prime (8420319077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210159688 + 4210159689.

It is an arithmetic number, because the mean of its divisors is an integer number (4210159689).

Almost surely, 2^8420319377 is an apocalyptic number.

It is an amenable number.

8420319377 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420319377 is an equidigital number, since it uses as much as digits as its factorization.

8420319377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 8420319377 is about 91762.2982329889. The cubic root of 8420319377 is about 2034.4304843003.

The spelling of 8420319377 in words is "eight billion, four hundred twenty million, three hundred nineteen thousand, three hundred seventy-seven".