1391614669 has 2 divisors, whose sum is σ = 1391614670. Its totient is φ = 1391614668.

The previous prime is 1391614667. The next prime is 1391614687. The reversal of 1391614669 is 9664161931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1387562500 + 4052169 = 37250^2 + 2013^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391614669 - 2¹ = 1391614667 is a prime.

It is a super-2 number, since 2×1391614669² = 3873182773951959122, which contains 22 as substring.

Together with 1391614667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391614667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695807334 + 695807335.

It is an arithmetic number, because the mean of its divisors is an integer number (695807335).

Almost surely, 2^1391614669 is an apocalyptic number.

It is an amenable number.

1391614669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391614669 is an equidigital number, since it uses as much as digits as its factorization.

1391614669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 46.

The square root of 1391614669 is about 37304.3518774955. The cubic root of 1391614669 is about 1116.4509973134.

The spelling of 1391614669 in words is "one billion, three hundred ninety-one million, six hundred fourteen thousand, six hundred sixty-nine".