1009649 has 2 divisors, whose sum is σ = 1009650. Its totient is φ = 1009648.

The previous prime is 1009643. The next prime is 1009651. The reversal of 1009649 is 9469001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 135424 = 935^2 + 368^2 .

It is an emirp because it is prime and its reverse (9469001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1009649 - 2¹² = 1005553 is a prime.

It is a super-2 number, since 2×1009649² = 2038782206402, which contains 22 as substring.

Together with 1009651, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₇₉₂₂₉ and since 1009649 and 79229 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1009643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504824 + 504825.

It is an arithmetic number, because the mean of its divisors is an integer number (504825).

2^1009649 is an apocalyptic number.

It is an amenable number.

1009649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009649 is an equidigital number, since it uses as much as digits as its factorization.

1009649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1009649 is about 1004.8129179106. The cubic root of 1009649 is about 100.3206043633.

The spelling of 1009649 in words is "one million, nine thousand, six hundred forty-nine".