208977401 has 2 divisors, whose sum is σ = 208977402. Its totient is φ = 208977400.

The previous prime is 208977397. The next prime is 208977437. The reversal of 208977401 is 104779802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199515625 + 9461776 = 14125^2 + 3076^2 .

It is a cyclic number.

It is not a de Polignac number, because 208977401 - 2² = 208977397 is a prime.

It is not a weakly prime, because it can be changed into another prime (208977101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104488700 + 104488701.

It is an arithmetic number, because the mean of its divisors is an integer number (104488701).

Almost surely, 2^208977401 is an apocalyptic number.

It is an amenable number.

208977401 is a deficient number, since it is larger than the sum of its proper divisors (1).

208977401 is an equidigital number, since it uses as much as digits as its factorization.

208977401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 208977401 is about 14456.0506709129. The cubic root of 208977401 is about 593.4258236142.

The spelling of 208977401 in words is "two hundred eight million, nine hundred seventy-seven thousand, four hundred one".