187401601 has 2 divisors, whose sum is σ = 187401602. Its totient is φ = 187401600.

The previous prime is 187401593. The next prime is 187401647. The reversal of 187401601 is 106104781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129413376 + 57988225 = 11376^2 + 7615^2 .

It is a cyclic number.

It is not a de Polignac number, because 187401601 - 2³ = 187401593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 187401601.

It is not a weakly prime, because it can be changed into another prime (187401671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93700800 + 93700801.

It is an arithmetic number, because the mean of its divisors is an integer number (93700801).

Almost surely, 2^187401601 is an apocalyptic number.

It is an amenable number.

187401601 is a deficient number, since it is larger than the sum of its proper divisors (1).

187401601 is an equidigital number, since it uses as much as digits as its factorization.

187401601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 187401601 is about 13689.4704426431. The cubic root of 187401601 is about 572.2569804353.

The spelling of 187401601 in words is "one hundred eighty-seven million, four hundred one thousand, six hundred one".