208942901 has 4 divisors (see below), whose sum is σ = 209129100. Its totient is φ = 208756704.

The previous prime is 208942861. The next prime is 208942919. The reversal of 208942901 is 109249802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109249802 = 2 ⋅54624901.

It can be written as a sum of positive squares in 2 ways, for example, as 128822500 + 80120401 = 11350^2 + 8951^2 .

It is a cyclic number.

It is not a de Polignac number, because 208942901 - 2¹⁰ = 208941877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208942001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91406 + ... + 93663.

It is an arithmetic number, because the mean of its divisors is an integer number (52282275).

Almost surely, 2^208942901 is an apocalyptic number.

It is an amenable number.

208942901 is a deficient number, since it is larger than the sum of its proper divisors (186199).

208942901 is a wasteful number, since it uses less digits than its factorization.

208942901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186198.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 208942901 is about 14454.8573496939. The cubic root of 208942901 is about 593.3931656688.

The spelling of 208942901 in words is "two hundred eight million, nine hundred forty-two thousand, nine hundred one".