1926649 has 2 divisors, whose sum is σ = 1926650. Its totient is φ = 1926648.

The previous prime is 1926647. The next prime is 1926653. The reversal of 1926649 is 9466291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1871424 + 55225 = 1368^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1926649 - 2¹ = 1926647 is a prime.

Together with 1926647, it forms a pair of twin primes.

It is a Chen prime.

1926649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1926647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 963324 + 963325.

It is an arithmetic number, because the mean of its divisors is an integer number (963325).

2^1926649 is an apocalyptic number.

It is an amenable number.

1926649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1926649 is an equidigital number, since it uses as much as digits as its factorization.

1926649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 1926649 is about 1388.0378236921. The cubic root of 1926649 is about 124.4326070857.

The spelling of 1926649 in words is "one million, nine hundred twenty-six thousand, six hundred forty-nine".