3942239777477 has 2 divisors, whose sum is σ = 3942239777478. Its totient is φ = 3942239777476.

The previous prime is 3942239777461. The next prime is 3942239777519. The reversal of 3942239777477 is 7747779322493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2413421283361 + 1528818494116 = 1553519^2 + 1236454^2 .

It is a cyclic number.

It is not a de Polignac number, because 3942239777477 - 2⁴ = 3942239777461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3942239777477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3942239777447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971119888738 + 1971119888739.

It is an arithmetic number, because the mean of its divisors is an integer number (1971119888739).

Almost surely, 2^{3942239777477} is an apocalyptic number.

It is an amenable number.

3942239777477 is a deficient number, since it is larger than the sum of its proper divisors (1).

3942239777477 is an equidigital number, since it uses as much as digits as its factorization.

3942239777477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 784147392, while the sum is 71.

The spelling of 3942239777477 in words is "three trillion, nine hundred forty-two billion, two hundred thirty-nine million, seven hundred seventy-seven thousand, four hundred seventy-seven".