100643941 has 2 divisors, whose sum is σ = 100643942. Its totient is φ = 100643940.

The previous prime is 100643843. The next prime is 100643953. The reversal of 100643941 is 149346001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68392900 + 32251041 = 8270^2 + 5679^2 .

It is a cyclic number.

It is not a de Polignac number, because 100643941 - 2⁷ = 100643813 is a prime.

It is a super-2 number, since 2×100643941² = 20258405720022962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100643981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50321970 + 50321971.

It is an arithmetic number, because the mean of its divisors is an integer number (50321971).

Almost surely, 2^100643941 is an apocalyptic number.

It is an amenable number.

100643941 is a deficient number, since it is larger than the sum of its proper divisors (1).

100643941 is an equidigital number, since it uses as much as digits as its factorization.

100643941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 100643941 is about 10032.1453837153. The cubic root of 100643941 is about 465.1530555627.

Adding to 100643941 its reverse (149346001), we get a palindrome (249989942).

The spelling of 100643941 in words is "one hundred million, six hundred forty-three thousand, nine hundred forty-one".