1723961 has 2 divisors, whose sum is σ = 1723962. Its totient is φ = 1723960.

The previous prime is 1723957. The next prime is 1723973. The reversal of 1723961 is 1693271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1428025 + 295936 = 1195^2 + 544^2 .

It is an emirp because it is prime and its reverse (1693271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1723961 - 2² = 1723957 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1723991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861980 + 861981.

It is an arithmetic number, because the mean of its divisors is an integer number (861981).

2^1723961 is an apocalyptic number.

It is an amenable number.

1723961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1723961 is an equidigital number, since it uses as much as digits as its factorization.

1723961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 1723961 is about 1312.9969535380. The cubic root of 1723961 is about 119.9064316900.

The spelling of 1723961 in words is "one million, seven hundred twenty-three thousand, nine hundred sixty-one".