246649409 has 2 divisors, whose sum is σ = 246649410. Its totient is φ = 246649408.

The previous prime is 246649397. The next prime is 246649427. The reversal of 246649409 is 904946642.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175297600 + 71351809 = 13240^2 + 8447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-246649409 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 246649409.

It is not a weakly prime, because it can be changed into another prime (246649489) 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, 123324704 + 123324705.

It is an arithmetic number, because the mean of its divisors is an integer number (123324705).

Almost surely, 2^246649409 is an apocalyptic number.

It is an amenable number.

246649409 is a deficient number, since it is larger than the sum of its proper divisors (1).

246649409 is an equidigital number, since it uses as much as digits as its factorization.

246649409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 246649409 is about 15705.0758992117. The cubic root of 246649409 is about 627.1335375539.

The spelling of 246649409 in words is "two hundred forty-six million, six hundred forty-nine thousand, four hundred nine".