1377973843 has 2 divisors, whose sum is σ = 1377973844. Its totient is φ = 1377973842.

The previous prime is 1377973823. The next prime is 1377973897. The reversal of 1377973843 is 3483797731.

It is a weak prime.

It is an emirp because it is prime and its reverse (3483797731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377973843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1377973813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688986921 + 688986922.

It is an arithmetic number, because the mean of its divisors is an integer number (688986922).

Almost surely, 2^1377973843 is an apocalyptic number.

1377973843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377973843 is an equidigital number, since it uses as much as digits as its factorization.

1377973843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 52.

The square root of 1377973843 is about 37121.0700680894. The cubic root of 1377973843 is about 1112.7911368327.

The spelling of 1377973843 in words is "one billion, three hundred seventy-seven million, nine hundred seventy-three thousand, eight hundred forty-three".