1954649 has 2 divisors, whose sum is σ = 1954650. Its totient is φ = 1954648.

The previous prime is 1954639. The next prime is 1954661. The reversal of 1954649 is 9464591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1545049 + 409600 = 1243^2 + 640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1954649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1954639) 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, 977324 + 977325.

It is an arithmetic number, because the mean of its divisors is an integer number (977325).

2^1954649 is an apocalyptic number.

It is an amenable number.

1954649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954649 is an equidigital number, since it uses as much as digits as its factorization.

1954649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 1954649 is about 1398.0876224329. The cubic root of 1954649 is about 125.0325035474.

The spelling of 1954649 in words is "one million, nine hundred fifty-four thousand, six hundred forty-nine".