1680590953 has 2 divisors, whose sum is σ = 1680590954. Its totient is φ = 1680590952.

The previous prime is 1680590929. The next prime is 1680590959. The reversal of 1680590953 is 3590950861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336414249 + 344176704 = 36557^2 + 18552^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680590953 - 2⁹ = 1680590441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680590959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840295476 + 840295477.

It is an arithmetic number, because the mean of its divisors is an integer number (840295477).

Almost surely, 2^1680590953 is an apocalyptic number.

It is an amenable number.

1680590953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680590953 is an equidigital number, since it uses as much as digits as its factorization.

1680590953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 1680590953 is about 40995.0113184519. The cubic root of 1680590953 is about 1188.9237622483.

The spelling of 1680590953 in words is "one billion, six hundred eighty million, five hundred ninety thousand, nine hundred fifty-three".