100603409 has 2 divisors, whose sum is σ = 100603410. Its totient is φ = 100603408.

The previous prime is 100603367. The next prime is 100603411. The reversal of 100603409 is 904306001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72301009 + 28302400 = 8503^2 + 5320^2 .

It is a cyclic number.

It is not a de Polignac number, because 100603409 - 2¹² = 100599313 is a prime.

Together with 100603411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100603429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50301704 + 50301705.

It is an arithmetic number, because the mean of its divisors is an integer number (50301705).

Almost surely, 2^100603409 is an apocalyptic number.

It is an amenable number.

100603409 is a deficient number, since it is larger than the sum of its proper divisors (1).

100603409 is an equidigital number, since it uses as much as digits as its factorization.

100603409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 100603409 is about 10030.1250739958. The cubic root of 100603409 is about 465.0906039967.

The spelling of 100603409 in words is "one hundred million, six hundred three thousand, four hundred nine".