1948729 has 2 divisors, whose sum is σ = 1948730. Its totient is φ = 1948728.

The previous prime is 1948703. The next prime is 1948741. The reversal of 1948729 is 9278491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 2704 = 1395^2 + 52^2 .

It is an emirp because it is prime and its reverse (9278491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1948729 - 2⁷ = 1948601 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1948691 and 1948700.

It is not a weakly prime, because it can be changed into another prime (1948759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974364 + 974365.

It is an arithmetic number, because the mean of its divisors is an integer number (974365).

2^1948729 is an apocalyptic number.

It is an amenable number.

1948729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948729 is an equidigital number, since it uses as much as digits as its factorization.

1948729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 1948729 is about 1395.9688391938. The cubic root of 1948729 is about 124.9061482190.

The spelling of 1948729 in words is "one million, nine hundred forty-eight thousand, seven hundred twenty-nine".