100605506 has 4 divisors (see below), whose sum is σ = 150908262. Its totient is φ = 50302752.

The previous prime is 100605499. The next prime is 100605517. The reversal of 100605506 is 605506001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605506001 = 67 ⋅9037403.

It can be written as a sum of positive squares in only one way, i.e., 96216481 + 4389025 = 9809^2 + 2095^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25151375 + ... + 25151378.

Almost surely, 2^100605506 is an apocalyptic number.

100605506 is a deficient number, since it is larger than the sum of its proper divisors (50302756).

100605506 is an equidigital number, since it uses as much as digits as its factorization.

100605506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50302755.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 100605506 is about 10030.2296085384. The cubic root of 100605506 is about 465.0938354585.

The spelling of 100605506 in words is "one hundred million, six hundred five thousand, five hundred six".