208214977 has 4 divisors (see below), whose sum is σ = 219173680. Its totient is φ = 197256276.

The previous prime is 208214971. The next prime is 208214989. The reversal of 208214977 is 779412802.

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 208214977 - 2³ = 208214969 is a prime.

It is a super-2 number, since 2×208214977² = 86706953294221058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208214971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5479323 + ... + 5479360.

It is an arithmetic number, because the mean of its divisors is an integer number (54793420).

Almost surely, 2^208214977 is an apocalyptic number.

It is an amenable number.

208214977 is a deficient number, since it is larger than the sum of its proper divisors (10958703).

208214977 is a wasteful number, since it uses less digits than its factorization.

208214977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958702.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 208214977 is about 14429.6561636097. The cubic root of 208214977 is about 592.7032679228.

The spelling of 208214977 in words is "two hundred eight million, two hundred fourteen thousand, nine hundred seventy-seven".