208701601 has 4 divisors (see below), whose sum is σ = 208890900. Its totient is φ = 208512304.

The previous prime is 208701593. The next prime is 208701617. The reversal of 208701601 is 106107802.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12673600 + 196028001 = 3560^2 + 14001^2 .

It is a cyclic number.

It is not a de Polignac number, because 208701601 - 2³ = 208701593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208701631) 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, 92986 + ... + 95203.

It is an arithmetic number, because the mean of its divisors is an integer number (52222725).

Almost surely, 2^208701601 is an apocalyptic number.

It is an amenable number.

208701601 is a deficient number, since it is larger than the sum of its proper divisors (189299).

208701601 is a wasteful number, since it uses less digits than its factorization.

208701601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189298.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 208701601 is about 14446.5082632448. The cubic root of 208701601 is about 593.1646488100.

The spelling of 208701601 in words is "two hundred eight million, seven hundred one thousand, six hundred one".