1357340381 has 2 divisors, whose sum is σ = 1357340382. Its totient is φ = 1357340380.

The previous prime is 1357340351. The next prime is 1357340399. The reversal of 1357340381 is 1830437531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1151991481 + 205348900 = 33941^2 + 14330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1357340381 is a prime.

It is a super-2 number, since 2×1357340381² = 3684745819786450322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1357340321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678670190 + 678670191.

It is an arithmetic number, because the mean of its divisors is an integer number (678670191).

Almost surely, 2^1357340381 is an apocalyptic number.

It is an amenable number.

1357340381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1357340381 is an equidigital number, since it uses as much as digits as its factorization.

1357340381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1357340381 is about 36842.1006594358. The cubic root of 1357340381 is about 1107.2089555170.

The spelling of 1357340381 in words is "one billion, three hundred fifty-seven million, three hundred forty thousand, three hundred eighty-one".