100633381 has 2 divisors, whose sum is σ = 100633382. Its totient is φ = 100633380.

The previous prime is 100633343. The next prime is 100633391. The reversal of 100633381 is 183336001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99700225 + 933156 = 9985^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 100633381 - 2¹⁵ = 100600613 is a prime.

It is a super-2 number, since 2×100633381² = 20254154742982322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100633321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50316690 + 50316691.

It is an arithmetic number, because the mean of its divisors is an integer number (50316691).

Almost surely, 2^100633381 is an apocalyptic number.

It is an amenable number.

100633381 is a deficient number, since it is larger than the sum of its proper divisors (1).

100633381 is an equidigital number, since it uses as much as digits as its factorization.

100633381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 100633381 is about 10031.6190617467. The cubic root of 100633381 is about 465.1367863665.

Adding to 100633381 its reverse (183336001), we get a palindrome (283969382).

The spelling of 100633381 in words is "one hundred million, six hundred thirty-three thousand, three hundred eighty-one".