208425913 has 4 divisors (see below), whose sum is σ = 209925520. Its totient is φ = 206926308.

The previous prime is 208425907. The next prime is 208425949. The reversal of 208425913 is 319524802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 319524802 = 2 ⋅159762401.

It is a cyclic number.

It is not a de Polignac number, because 208425913 - 2¹⁷ = 208294841 is a prime.

It is a super-2 number, since 2×208425913² = 86882722419767138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208425013) 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, 749595 + ... + 749872.

It is an arithmetic number, because the mean of its divisors is an integer number (52481380).

Almost surely, 2^208425913 is an apocalyptic number.

It is an amenable number.

208425913 is a deficient number, since it is larger than the sum of its proper divisors (1499607).

208425913 is a wasteful number, since it uses less digits than its factorization.

208425913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499606.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 208425913 is about 14436.9634272585. The cubic root of 208425913 is about 592.9033500099.

The spelling of 208425913 in words is "two hundred eight million, four hundred twenty-five thousand, nine hundred thirteen".