1380723637 has 2 divisors, whose sum is σ = 1380723638. Its totient is φ = 1380723636.

The previous prime is 1380723599. The next prime is 1380723647. The reversal of 1380723637 is 7363270831.

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., 788823396 + 591900241 = 28086^2 + 24329^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380723637 - 2¹⁵ = 1380690869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1380723637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380723647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690361818 + 690361819.

It is an arithmetic number, because the mean of its divisors is an integer number (690361819).

Almost surely, 2^1380723637 is an apocalyptic number.

It is an amenable number.

1380723637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380723637 is an equidigital number, since it uses as much as digits as its factorization.

1380723637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 1380723637 is about 37158.0897921301. The cubic root of 1380723637 is about 1113.5308492859.

The spelling of 1380723637 in words is "one billion, three hundred eighty million, seven hundred twenty-three thousand, six hundred thirty-seven".