1381679513 has 2 divisors, whose sum is σ = 1381679514. Its totient is φ = 1381679512.

The previous prime is 1381679477. The next prime is 1381679527. The reversal of 1381679513 is 3159761831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1368408064 + 13271449 = 36992^2 + 3643^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381679513 - 2¹² = 1381675417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1381679813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690839756 + 690839757.

It is an arithmetic number, because the mean of its divisors is an integer number (690839757).

Almost surely, 2^1381679513 is an apocalyptic number.

It is an amenable number.

1381679513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381679513 is an equidigital number, since it uses as much as digits as its factorization.

1381679513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 1381679513 is about 37170.9498533465. The cubic root of 1381679513 is about 1113.7877560876.

The spelling of 1381679513 in words is "one billion, three hundred eighty-one million, six hundred seventy-nine thousand, five hundred thirteen".