1375523969 has 8 divisors (see below), whose sum is σ = 1424765160. Its totient is φ = 1326403456.

The previous prime is 1375523957. The next prime is 1375523983. The reversal of 1375523969 is 9693255731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 78400 + 1375445569 = 280^2 + 37087^2 .

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 1375523969 - 2⁸ = 1375523713 is a prime.

It is a super-2 number, since 2×1375523969² = 3784132378587025922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1375523269) 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, 6644 + ... + 52869.

It is an arithmetic number, because the mean of its divisors is an integer number (178095645).

Almost surely, 2^1375523969 is an apocalyptic number.

It is an amenable number.

1375523969 is a deficient number, since it is larger than the sum of its proper divisors (49241191).

1375523969 is an equidigital number, since it uses as much as digits as its factorization.

1375523969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60339.

The product of its digits is 1530900, while the sum is 50.

The square root of 1375523969 is about 37088.0569590805. The cubic root of 1375523969 is about 1112.1312754224.

The spelling of 1375523969 in words is "one billion, three hundred seventy-five million, five hundred twenty-three thousand, nine hundred sixty-nine".