1373665969 has 9 divisors (see below), whose sum is σ = 1487982699. Its totient is φ = 1267554600.

The previous prime is 1373665957. The next prime is 1373665973. The reversal of 1373665969 is 9695663731.

The square root of 1373665969 is 37063.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 203205025 + 1170460944 = 14255^2 + 34212^2 .

It is not a de Polignac number, because 1373665969 - 2⁹ = 1373665457 is a prime.

It is a super-2 number, since 2×1373665969² = 3773916388777417922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1373665949) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 480394 + ... + 483244.

It is an arithmetic number, because the mean of its divisors is an integer number (165331411).

Almost surely, 2^1373665969 is an apocalyptic number.

1373665969 is the 37063-rd square number.

1373665969 is the 18532-nd centered octagonal number.

It is an amenable number.

1373665969 is a deficient number, since it is larger than the sum of its proper divisors (114316730).

1373665969 is an frugal number, since it uses more digits than its factorization.

1373665969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728 (or 2864 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 55.

The cubic root of 1373665969 is about 1111.6303097225.

The spelling of 1373665969 in words is "one billion, three hundred seventy-three million, six hundred sixty-five thousand, nine hundred sixty-nine".