208494997 has 4 divisors (see below), whose sum is σ = 208611936. Its totient is φ = 208378060.

The previous prime is 208494973. The next prime is 208495019. The reversal of 208494997 is 799494802.

It is a happy number.

208494997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 208494997 - 2¹⁵ = 208462229 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 (208494947) 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, 55753 + ... + 59374.

It is an arithmetic number, because the mean of its divisors is an integer number (52152984).

Almost surely, 2^208494997 is an apocalyptic number.

It is an amenable number.

208494997 is a deficient number, since it is larger than the sum of its proper divisors (116939).

208494997 is a wasteful number, since it uses less digits than its factorization.

208494997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116938.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 208494997 is about 14439.3558374326. The cubic root of 208494997 is about 592.9688498795.

The spelling of 208494997 in words is "two hundred eight million, four hundred ninety-four thousand, nine hundred ninety-seven".