1376427643 has 2 divisors, whose sum is σ = 1376427644. Its totient is φ = 1376427642.

The previous prime is 1376427641. The next prime is 1376427673. The reversal of 1376427643 is 3467246731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1376427643 - 2¹ = 1376427641 is a prime.

Together with 1376427641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1376427643.

It is not a weakly prime, because it can be changed into another prime (1376427641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688213821 + 688213822.

It is an arithmetic number, because the mean of its divisors is an integer number (688213822).

Almost surely, 2^1376427643 is an apocalyptic number.

1376427643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376427643 is an equidigital number, since it uses as much as digits as its factorization.

1376427643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 43.

The square root of 1376427643 is about 37100.2377755184. The cubic root of 1376427643 is about 1112.3747666631.

The spelling of 1376427643 in words is "one billion, three hundred seventy-six million, four hundred twenty-seven thousand, six hundred forty-three".