1369071921 has 8 divisors (see below), whose sum is σ = 2086204864. Its totient is φ = 782326800.

The previous prime is 1369071919. The next prime is 1369071967. The reversal of 1369071921 is 1291709631.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1369071921 - 2¹ = 1369071919 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1369071921.

It is not an unprimeable number, because it can be changed into a prime (1369071901) 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 in 7 ways as a sum of consecutive naturals, for example, 32596930 + ... + 32596971.

It is an arithmetic number, because the mean of its divisors is an integer number (260775608).

Almost surely, 2^1369071921 is an apocalyptic number.

It is an amenable number.

1369071921 is a deficient number, since it is larger than the sum of its proper divisors (717132943).

1369071921 is an equidigital number, since it uses as much as digits as its factorization.

1369071921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65193911.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 1369071921 is about 37000.9718926409. The cubic root of 1369071921 is about 1110.3896911100.

The spelling of 1369071921 in words is "one billion, three hundred sixty-nine million, seventy-one thousand, nine hundred twenty-one".