1691247083 has 2 divisors, whose sum is σ = 1691247084. Its totient is φ = 1691247082.

The previous prime is 1691247049. The next prime is 1691247163. The reversal of 1691247083 is 3807421961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1691247083 - 2⁸ = 1691246827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1691247083.

It is not a weakly prime, because it can be changed into another prime (1691217083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845623541 + 845623542.

It is an arithmetic number, because the mean of its divisors is an integer number (845623542).

Almost surely, 2^1691247083 is an apocalyptic number.

1691247083 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691247083 is an equidigital number, since it uses as much as digits as its factorization.

1691247083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1691247083 is about 41124.7745647317. The cubic root of 1691247083 is about 1191.4313410249.

The spelling of 1691247083 in words is "one billion, six hundred ninety-one million, two hundred forty-seven thousand, eighty-three".