1649609503 has 2 divisors, whose sum is σ = 1649609504. Its totient is φ = 1649609502.

The previous prime is 1649609491. The next prime is 1649609531. The reversal of 1649609503 is 3059069461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1649609503 - 2¹³ = 1649601311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1649609503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1647609503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824804751 + 824804752.

It is an arithmetic number, because the mean of its divisors is an integer number (824804752).

Almost surely, 2^1649609503 is an apocalyptic number.

1649609503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649609503 is an equidigital number, since it uses as much as digits as its factorization.

1649609503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 1649609503 is about 40615.3850529575. The cubic root of 1649609503 is about 1181.5725235307.

The spelling of 1649609503 in words is "one billion, six hundred forty-nine million, six hundred nine thousand, five hundred three".