1043900208649 has 4 divisors (see below), whose sum is σ = 1077574408960. Its totient is φ = 1010226008340.

The previous prime is 1043900208613. The next prime is 1043900208679. The reversal of 1043900208649 is 9468020093401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1043900208649 - 2⁷ = 1043900208521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1043900208599 and 1043900208608.

It is not an unprimeable number, because it can be changed into a prime (1043900208679) 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, 16837100109 + ... + 16837100170.

It is an arithmetic number, because the mean of its divisors is an integer number (269393602240).

Almost surely, 2^{1043900208649} is an apocalyptic number.

It is an amenable number.

1043900208649 is a deficient number, since it is larger than the sum of its proper divisors (33674200311).

1043900208649 is an equidigital number, since it uses as much as digits as its factorization.

1043900208649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33674200310.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 1043900208649 in words is "one trillion, forty-three billion, nine hundred million, two hundred eight thousand, six hundred forty-nine".