1377643 has 2 divisors, whose sum is σ = 1377644. Its totient is φ = 1377642.

The previous prime is 1377637. The next prime is 1377653. The reversal of 1377643 is 3467731.

It is a weak prime.

It is an emirp because it is prime and its reverse (3467731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377643 - 2¹³ = 1369451 is a prime.

1377643 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1377653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688821 + 688822.

It is an arithmetic number, because the mean of its divisors is an integer number (688822).

2^1377643 is an apocalyptic number.

1377643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377643 is an equidigital number, since it uses as much as digits as its factorization.

1377643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 31.

The square root of 1377643 is about 1173.7303778978. The cubic root of 1377643 is about 111.2702071614.

The spelling of 1377643 in words is "one million, three hundred seventy-seven thousand, six hundred forty-three".