1919360077 has 2 divisors, whose sum is σ = 1919360078. Its totient is φ = 1919360076.

The previous prime is 1919360057. The next prime is 1919360117. The reversal of 1919360077 is 7700639191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1736055556 + 183304521 = 41666^2 + 13539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1919360077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1919360057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959680038 + 959680039.

It is an arithmetic number, because the mean of its divisors is an integer number (959680039).

Almost surely, 2^1919360077 is an apocalyptic number.

It is an amenable number.

1919360077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919360077 is an equidigital number, since it uses as much as digits as its factorization.

1919360077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 1919360077 is about 43810.5019030826. The cubic root of 1919360077 is about 1242.7549044306.

The spelling of 1919360077 in words is "one billion, nine hundred nineteen million, three hundred sixty thousand, seventy-seven".