1606650191 has 2 divisors, whose sum is σ = 1606650192. Its totient is φ = 1606650190.

The previous prime is 1606650187. The next prime is 1606650197. The reversal of 1606650191 is 1910566061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1606650191 - 2² = 1606650187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606650197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803325095 + 803325096.

It is an arithmetic number, because the mean of its divisors is an integer number (803325096).

Almost surely, 2^1606650191 is an apocalyptic number.

1606650191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606650191 is an equidigital number, since it uses as much as digits as its factorization.

1606650191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1606650191 is about 40083.0411895106. The cubic root of 1606650191 is about 1171.2252951101.

The spelling of 1606650191 in words is "one billion, six hundred six million, six hundred fifty thousand, one hundred ninety-one".