1649001103 has 4 divisors (see below), whose sum is σ = 1705863240. Its totient is φ = 1592138968.

The previous prime is 1649001083. The next prime is 1649001113. The reversal of 1649001103 is 3011009461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649001103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649001113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28431025 + ... + 28431082.

It is an arithmetic number, because the mean of its divisors is an integer number (426465810).

Almost surely, 2^1649001103 is an apocalyptic number.

1649001103 is a deficient number, since it is larger than the sum of its proper divisors (56862137).

1649001103 is an equidigital number, since it uses as much as digits as its factorization.

1649001103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56862136.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1649001103 is about 40607.8945895992. The cubic root of 1649001103 is about 1181.4272452862.

The spelling of 1649001103 in words is "one billion, six hundred forty-nine million, one thousand, one hundred three".