1660723 has 2 divisors, whose sum is σ = 1660724. Its totient is φ = 1660722.

The previous prime is 1660721. The next prime is 1660727. The reversal of 1660723 is 3270661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1660723 - 2¹ = 1660721 is a prime.

Together with 1660721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1660721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830361 + 830362.

It is an arithmetic number, because the mean of its divisors is an integer number (830362).

2^1660723 is an apocalyptic number.

1660723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660723 is an equidigital number, since it uses as much as digits as its factorization.

1660723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1660723 is about 1288.6904205433. The cubic root of 1660723 is about 118.4220023558.

The spelling of 1660723 in words is "one million, six hundred sixty thousand, seven hundred twenty-three".