3890420761 has 2 divisors, whose sum is σ = 3890420762. Its totient is φ = 3890420760.

The previous prime is 3890420719. The next prime is 3890420771. The reversal of 3890420761 is 1670240983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3086358025 + 804062736 = 55555^2 + 28356^2 .

It is a cyclic number.

It is not a de Polignac number, because 3890420761 - 2⁹ = 3890420249 is a prime.

It is not a weakly prime, because it can be changed into another prime (3890420711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945210380 + 1945210381.

It is an arithmetic number, because the mean of its divisors is an integer number (1945210381).

Almost surely, 2^3890420761 is an apocalyptic number.

It is an amenable number.

3890420761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3890420761 is an equidigital number, since it uses as much as digits as its factorization.

3890420761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 3890420761 is about 62373.2375382263. The cubic root of 3890420761 is about 1572.7711159663.

The spelling of 3890420761 in words is "three billion, eight hundred ninety million, four hundred twenty thousand, seven hundred sixty-one".