1358681669 has 4 divisors (see below), whose sum is σ = 1359218496. Its totient is φ = 1358144844.

The previous prime is 1358681651. The next prime is 1358681683. The reversal of 1358681669 is 9661868531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1358681669 is a prime.

It is a super-2 number, since 2×1358681669² = 3692031755353251122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1358681669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1358681869) 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 in 3 ways as a sum of consecutive naturals, for example, 264599 + ... + 269684.

It is an arithmetic number, because the mean of its divisors is an integer number (339804624).

Almost surely, 2^1358681669 is an apocalyptic number.

It is an amenable number.

1358681669 is a deficient number, since it is larger than the sum of its proper divisors (536827).

1358681669 is an equidigital number, since it uses as much as digits as its factorization.

1358681669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536826.

The product of its digits is 1866240, while the sum is 53.

The square root of 1358681669 is about 36860.2993612369. The cubic root of 1358681669 is about 1107.5735403577.

The spelling of 1358681669 in words is "one billion, three hundred fifty-eight million, six hundred eighty-one thousand, six hundred sixty-nine".