1381306357 has 2 divisors, whose sum is σ = 1381306358. Its totient is φ = 1381306356.

The previous prime is 1381306307. The next prime is 1381306369. The reversal of 1381306357 is 7536031831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123992676 + 257313681 = 33526^2 + 16041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381306357 - 2¹⁵ = 1381273589 is a prime.

It is a super-2 number, since 2×1381306357² = 3816014503777222898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381306307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690653178 + 690653179.

It is an arithmetic number, because the mean of its divisors is an integer number (690653179).

Almost surely, 2^1381306357 is an apocalyptic number.

It is an amenable number.

1381306357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381306357 is an equidigital number, since it uses as much as digits as its factorization.

1381306357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 1381306357 is about 37165.9300569756. The cubic root of 1381306357 is about 1113.6874786109.

The spelling of 1381306357 in words is "one billion, three hundred eighty-one million, three hundred six thousand, three hundred fifty-seven".