1397069837 has 2 divisors, whose sum is σ = 1397069838. Its totient is φ = 1397069836.

The previous prime is 1397069831. The next prime is 1397069881. The reversal of 1397069837 is 7389607931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1111155556 + 285914281 = 33334^2 + 16909^2 .

It is an emirp because it is prime and its reverse (7389607931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1397069837 - 2²⁰ = 1396021261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397069831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698534918 + 698534919.

It is an arithmetic number, because the mean of its divisors is an integer number (698534919).

Almost surely, 2^1397069837 is an apocalyptic number.

It is an amenable number.

1397069837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397069837 is an equidigital number, since it uses as much as digits as its factorization.

1397069837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The square root of 1397069837 is about 37377.3974080593. The cubic root of 1397069837 is about 1117.9079348217.

The spelling of 1397069837 in words is "one billion, three hundred ninety-seven million, sixty-nine thousand, eight hundred thirty-seven".