1393142669 has 2 divisors, whose sum is σ = 1393142670. Its totient is φ = 1393142668.

The previous prime is 1393142659. The next prime is 1393142693. The reversal of 1393142669 is 9662413931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1349092900 + 44049769 = 36730^2 + 6637^2 .

It is an emirp because it is prime and its reverse (9662413931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1393142669 - 2¹² = 1393138573 is a prime.

It is a super-2 number, since 2×1393142669² = 3881692992376887122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1393142659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696571334 + 696571335.

It is an arithmetic number, because the mean of its divisors is an integer number (696571335).

Almost surely, 2^1393142669 is an apocalyptic number.

It is an amenable number.

1393142669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393142669 is an equidigital number, since it uses as much as digits as its factorization.

1393142669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 1393142669 is about 37324.8264429990. The cubic root of 1393142669 is about 1116.8594708098.

The spelling of 1393142669 in words is "one billion, three hundred ninety-three million, one hundred forty-two thousand, six hundred sixty-nine".