1377905801 has 2 divisors, whose sum is σ = 1377905802. Its totient is φ = 1377905800.

The previous prime is 1377905791. The next prime is 1377905831. The reversal of 1377905801 is 1085097731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1265651776 + 112254025 = 35576^2 + 10595^2 .

It is an emirp because it is prime and its reverse (1085097731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377905801 - 2¹⁰ = 1377904777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1377905831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688952900 + 688952901.

It is an arithmetic number, because the mean of its divisors is an integer number (688952901).

Almost surely, 2^1377905801 is an apocalyptic number.

It is an amenable number.

1377905801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377905801 is an equidigital number, since it uses as much as digits as its factorization.

1377905801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 1377905801 is about 37120.1535691866. The cubic root of 1377905801 is about 1112.7728206212.

The spelling of 1377905801 in words is "one billion, three hundred seventy-seven million, nine hundred five thousand, eight hundred one".