1380357161 has 2 divisors, whose sum is σ = 1380357162. Its totient is φ = 1380357160.

The previous prime is 1380357151. The next prime is 1380357169. The reversal of 1380357161 is 1617530831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721459600 + 658897561 = 26860^2 + 25669^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380357161 - 2²⁶ = 1313248297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1380357169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690178580 + 690178581.

It is an arithmetic number, because the mean of its divisors is an integer number (690178581).

Almost surely, 2^1380357161 is an apocalyptic number.

It is an amenable number.

1380357161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380357161 is an equidigital number, since it uses as much as digits as its factorization.

1380357161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1380357161 is about 37153.1581564744. The cubic root of 1380357161 is about 1113.4323216175.

Adding to 1380357161 its reverse (1617530831), we get a palindrome (2997887992).

The spelling of 1380357161 in words is "one billion, three hundred eighty million, three hundred fifty-seven thousand, one hundred sixty-one".