100649123 has 2 divisors, whose sum is σ = 100649124. Its totient is φ = 100649122.

The previous prime is 100649117. The next prime is 100649141. The reversal of 100649123 is 321946001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100649123 - 2¹⁴ = 100632739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100649092 and 100649101.

It is not a weakly prime, because it can be changed into another prime (100649113) 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, 50324561 + 50324562.

It is an arithmetic number, because the mean of its divisors is an integer number (50324562).

Almost surely, 2^100649123 is an apocalyptic number.

100649123 is a deficient number, since it is larger than the sum of its proper divisors (1).

100649123 is an equidigital number, since it uses as much as digits as its factorization.

100649123 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 26.

The square root of 100649123 is about 10032.4036501728. The cubic root of 100649123 is about 465.1610387615.

The spelling of 100649123 in words is "one hundred million, six hundred forty-nine thousand, one hundred twenty-three".