1377286513 has 2 divisors, whose sum is σ = 1377286514. Its totient is φ = 1377286512.

The previous prime is 1377286511. The next prime is 1377286523. The reversal of 1377286513 is 3156827731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1162605409 + 214681104 = 34097^2 + 14652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377286513 - 2¹ = 1377286511 is a prime.

Together with 1377286511, 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 1377286513.

It is not a weakly prime, because it can be changed into another prime (1377286511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688643256 + 688643257.

It is an arithmetic number, because the mean of its divisors is an integer number (688643257).

Almost surely, 2^1377286513 is an apocalyptic number.

It is an amenable number.

1377286513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377286513 is an equidigital number, since it uses as much as digits as its factorization.

1377286513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 1377286513 is about 37111.8109636272. The cubic root of 1377286513 is about 1112.6060868913.

The spelling of 1377286513 in words is "one billion, three hundred seventy-seven million, two hundred eighty-six thousand, five hundred thirteen".