208061953 has 4 divisors (see below), whose sum is σ = 226976688. Its totient is φ = 189147220.

The previous prime is 208061947. The next prime is 208061969. The reversal of 208061953 is 359160802.

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.

It is a cyclic number.

It is not a de Polignac number, because 208061953 - 2¹³ = 208053761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208061923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9457351 + ... + 9457372.

It is an arithmetic number, because the mean of its divisors is an integer number (56744172).

Almost surely, 2^208061953 is an apocalyptic number.

It is an amenable number.

208061953 is a deficient number, since it is larger than the sum of its proper divisors (18914735).

208061953 is a wasteful number, since it uses less digits than its factorization.

208061953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18914734.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 208061953 is about 14424.3527757747. The cubic root of 208061953 is about 592.5580333289.

The spelling of 208061953 in words is "two hundred eight million, sixty-one thousand, nine hundred fifty-three".