1648397923 has 2 divisors, whose sum is σ = 1648397924. Its totient is φ = 1648397922.

The previous prime is 1648397917. The next prime is 1648397929. The reversal of 1648397923 is 3297938461.

It is a balanced prime because it is at equal distance from previous prime (1648397917) and next prime (1648397929).

It is an emirp because it is prime and its reverse (3297938461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648397923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1648397929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824198961 + 824198962.

It is an arithmetic number, because the mean of its divisors is an integer number (824198962).

Almost surely, 2^1648397923 is an apocalyptic number.

1648397923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648397923 is an equidigital number, since it uses as much as digits as its factorization.

1648397923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The square root of 1648397923 is about 40600.4670293335. The cubic root of 1648397923 is about 1181.2831782326.

The spelling of 1648397923 in words is "one billion, six hundred forty-eight million, three hundred ninety-seven thousand, nine hundred twenty-three".