1375525639 has 2 divisors, whose sum is σ = 1375525640. Its totient is φ = 1375525638.

The previous prime is 1375525637. The next prime is 1375525673. The reversal of 1375525639 is 9365255731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1375525639 - 2¹ = 1375525637 is a prime.

Together with 1375525637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375525631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687762819 + 687762820.

It is an arithmetic number, because the mean of its divisors is an integer number (687762820).

Almost surely, 2^1375525639 is an apocalyptic number.

1375525639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375525639 is an equidigital number, since it uses as much as digits as its factorization.

1375525639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 46.

The square root of 1375525639 is about 37088.0794730598. The cubic root of 1375525639 is about 1112.1317254953.

The spelling of 1375525639 in words is "one billion, three hundred seventy-five million, five hundred twenty-five thousand, six hundred thirty-nine".