1371649369 has 8 divisors (see below), whose sum is σ = 1453045608. Its totient is φ = 1290332160.

The previous prime is 1371649361. The next prime is 1371649373. The reversal of 1371649369 is 9639461731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 551686144 + 819963225 = 23488^2 + 28635^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1371649369 - 2³ = 1371649361 is a prime.

It is a super-2 number, since 2×1371649369² = 3762843982956196322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371649361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18069 + ... + 55405.

It is an arithmetic number, because the mean of its divisors is an integer number (181630701).

Almost surely, 2^1371649369 is an apocalyptic number.

It is an amenable number.

1371649369 is a deficient number, since it is larger than the sum of its proper divisors (81396239).

1371649369 is a wasteful number, since it uses less digits than its factorization.

1371649369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39515.

The product of its digits is 734832, while the sum is 49.

The square root of 1371649369 is about 37035.7849788552. The cubic root of 1371649369 is about 1111.0860698064.

The spelling of 1371649369 in words is "one billion, three hundred seventy-one million, six hundred forty-nine thousand, three hundred sixty-nine".