3779887861 has 2 divisors, whose sum is σ = 3779887862. Its totient is φ = 3779887860.

The previous prime is 3779887849. The next prime is 3779887889. The reversal of 3779887861 is 1687889773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2842915761 + 936972100 = 53319^2 + 30610^2 .

It is a cyclic number.

It is not a de Polignac number, because 3779887861 - 2⁵ = 3779887829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3779887793 and 3779887802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3779887801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1889943930 + 1889943931.

It is an arithmetic number, because the mean of its divisors is an integer number (1889943931).

Almost surely, 2^3779887861 is an apocalyptic number.

It is an amenable number.

3779887861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3779887861 is an equidigital number, since it uses as much as digits as its factorization.

3779887861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28449792, while the sum is 64.

The square root of 3779887861 is about 61480.7926185081. The cubic root of 3779887861 is about 1557.7328261412.

The spelling of 3779887861 in words is "three billion, seven hundred seventy-nine million, eight hundred eighty-seven thousand, eight hundred sixty-one".