208687942 has 4 divisors (see below), whose sum is σ = 313031916. Its totient is φ = 104343970.

The previous prime is 208687931. The next prime is 208687949. The reversal of 208687942 is 249786802.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 208687892 and 208687901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208687949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52171984 + ... + 52171987.

It is an arithmetic number, because the mean of its divisors is an integer number (78257979).

Almost surely, 2^208687942 is an apocalyptic number.

208687942 is a deficient number, since it is larger than the sum of its proper divisors (104343974).

208687942 is a wasteful number, since it uses less digits than its factorization.

208687942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104343973.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 208687942 is about 14446.0355115166. The cubic root of 208687942 is about 593.1517081448.

The spelling of 208687942 in words is "two hundred eight million, six hundred eighty-seven thousand, nine hundred forty-two".