1654649 has 2 divisors, whose sum is σ = 1654650. Its totient is φ = 1654648.

The previous prime is 1654579. The next prime is 1654651. The reversal of 1654649 is 9464561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 573049 = 1040^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1654649 - 2¹² = 1650553 is a prime.

Together with 1654651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1656649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827324 + 827325.

It is an arithmetic number, because the mean of its divisors is an integer number (827325).

2^1654649 is an apocalyptic number.

It is an amenable number.

1654649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1654649 is an equidigital number, since it uses as much as digits as its factorization.

1654649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 1654649 is about 1286.3316057689. The cubic root of 1654649 is about 118.2774520695.

The spelling of 1654649 in words is "one million, six hundred fifty-four thousand, six hundred forty-nine".