199487501 has 2 divisors, whose sum is σ = 199487502. Its totient is φ = 199487500.

The previous prime is 199487489. The next prime is 199487527. The reversal of 199487501 is 105784991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152893225 + 46594276 = 12365^2 + 6826^2 .

It is a cyclic number.

It is not a de Polignac number, because 199487501 - 2¹⁴ = 199471117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199487531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99743750 + 99743751.

It is an arithmetic number, because the mean of its divisors is an integer number (99743751).

Almost surely, 2^199487501 is an apocalyptic number.

It is an amenable number.

199487501 is a deficient number, since it is larger than the sum of its proper divisors (1).

199487501 is an equidigital number, since it uses as much as digits as its factorization.

199487501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 199487501 is about 14124.0044250913. The cubic root of 199487501 is about 584.3036016404.

The spelling of 199487501 in words is "one hundred ninety-nine million, four hundred eighty-seven thousand, five hundred one".