1704216491 has 2 divisors, whose sum is σ = 1704216492. Its totient is φ = 1704216490.

The previous prime is 1704216461. The next prime is 1704216497. The reversal of 1704216491 is 1946124071.

It is a strong prime.

It is an emirp because it is prime and its reverse (1946124071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1704216491 - 2⁶ = 1704216427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1704216497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852108245 + 852108246.

It is an arithmetic number, because the mean of its divisors is an integer number (852108246).

Almost surely, 2^1704216491 is an apocalyptic number.

1704216491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1704216491 is an equidigital number, since it uses as much as digits as its factorization.

1704216491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1704216491 is about 41282.1570536231. The cubic root of 1704216491 is about 1194.4691049337.

It can be divided in two parts, 17042 and 16491, that added together give a palindrome (33533).

The spelling of 1704216491 in words is "one billion, seven hundred four million, two hundred sixteen thousand, four hundred ninety-one".