1649739403 has 8 divisors (see below), whose sum is σ = 1781738000. Its totient is φ = 1518468768.

The previous prime is 1649739401. The next prime is 1649739407. The reversal of 1649739403 is 3049379461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1649739403 - 2¹ = 1649739401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649739401) 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 in 7 ways as a sum of consecutive naturals, for example, 177273 + ... + 186346.

It is an arithmetic number, because the mean of its divisors is an integer number (222717250).

Almost surely, 2^1649739403 is an apocalyptic number.

1649739403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1649739403 is a deficient number, since it is larger than the sum of its proper divisors (131998597).

1649739403 is a wasteful number, since it uses less digits than its factorization.

1649739403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363981.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 1649739403 is about 40616.9841691872. The cubic root of 1649739403 is about 1181.6035373841.

The spelling of 1649739403 in words is "one billion, six hundred forty-nine million, seven hundred thirty-nine thousand, four hundred three".