1377313373 has 2 divisors, whose sum is σ = 1377313374. Its totient is φ = 1377313372.

The previous prime is 1377313321. The next prime is 1377313387. The reversal of 1377313373 is 3733137731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 888814969 + 488498404 = 29813^2 + 22102^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377313373 - 2¹⁸ = 1377051229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377313303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688656686 + 688656687.

It is an arithmetic number, because the mean of its divisors is an integer number (688656687).

Almost surely, 2^1377313373 is an apocalyptic number.

It is an amenable number.

1377313373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377313373 is an equidigital number, since it uses as much as digits as its factorization.

1377313373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83349, while the sum is 38.

The square root of 1377313373 is about 37112.1728412660. The cubic root of 1377313373 is about 1112.6133195682.

The spelling of 1377313373 in words is "one billion, three hundred seventy-seven million, three hundred thirteen thousand, three hundred seventy-three".