1377111643 has 2 divisors, whose sum is σ = 1377111644. Its totient is φ = 1377111642.

The previous prime is 1377111607. The next prime is 1377111653. The reversal of 1377111643 is 3461117731.

It is a strong prime.

It is an emirp because it is prime and its reverse (3461117731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377111643 - 2²¹ = 1375014491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377111599 and 1377111608.

It is not a weakly prime, because it can be changed into another prime (1377111653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688555821 + 688555822.

It is an arithmetic number, because the mean of its divisors is an integer number (688555822).

Almost surely, 2^1377111643 is an apocalyptic number.

1377111643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377111643 is an equidigital number, since it uses as much as digits as its factorization.

1377111643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 1377111643 is about 37109.4549003350. The cubic root of 1377111643 is about 1112.5589967955.

The spelling of 1377111643 in words is "one billion, three hundred seventy-seven million, one hundred eleven thousand, six hundred forty-three".