1375536989 has 2 divisors, whose sum is σ = 1375536990. Its totient is φ = 1375536988.

The previous prime is 1375536983. The next prime is 1375537117. The reversal of 1375536989 is 9896355731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921122500 + 454414489 = 30350^2 + 21317^2 .

It is an emirp because it is prime and its reverse (9896355731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1375536989 - 2⁴ = 1375536973 is a prime.

It is a super-2 number, since 2×1375536989² = 3784204016214372242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375536983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687768494 + 687768495.

It is an arithmetic number, because the mean of its divisors is an integer number (687768495).

Almost surely, 2^1375536989 is an apocalyptic number.

It is an amenable number.

1375536989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375536989 is an equidigital number, since it uses as much as digits as its factorization.

1375536989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6123600, while the sum is 56.

The square root of 1375536989 is about 37088.2324868684. The cubic root of 1375536989 is about 1112.1347843649.

The spelling of 1375536989 in words is "one billion, three hundred seventy-five million, five hundred thirty-six thousand, nine hundred eighty-nine".