1000535381 has 2 divisors, whose sum is σ = 1000535382. Its totient is φ = 1000535380.

The previous prime is 1000535303. The next prime is 1000535387. The reversal of 1000535381 is 1835350001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999192100 + 1343281 = 31610^2 + 1159^2 .

It is an emirp because it is prime and its reverse (1835350001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000535381 - 2¹⁴ = 1000518997 is a prime.

It is a super-2 number, since 2×1000535381² = 2002142097265630322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000535381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000535387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500267690 + 500267691.

It is an arithmetic number, because the mean of its divisors is an integer number (500267691).

Almost surely, 2^1000535381 is an apocalyptic number.

It is an amenable number.

1000535381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000535381 is an equidigital number, since it uses as much as digits as its factorization.

1000535381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1000535381 is about 31631.2405858512. The cubic root of 1000535381 is about 1000.1784284947.

Adding to 1000535381 its reverse (1835350001), we get a palindrome (2835885382).

The spelling of 1000535381 in words is "one billion, five hundred thirty-five thousand, three hundred eighty-one".