1380997 has 2 divisors, whose sum is σ = 1380998. Its totient is φ = 1380996.

The previous prime is 1380983. The next prime is 1381027. The reversal of 1380997 is 7990831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1179396 + 201601 = 1086^2 + 449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1380997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690498 + 690499.

It is an arithmetic number, because the mean of its divisors is an integer number (690499).

2^1380997 is an apocalyptic number.

It is an amenable number.

1380997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380997 is an equidigital number, since it uses as much as digits as its factorization.

1380997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1380997 is about 1175.1582872107. The cubic root of 1380997 is about 111.3604332021.

The spelling of 1380997 in words is "one million, three hundred eighty thousand, nine hundred ninety-seven".