1073680991 has 4 divisors (see below), whose sum is σ = 1073750712. Its totient is φ = 1073611272.

The previous prime is 1073680969. The next prime is 1073681003. The reversal of 1073680991 is 1990863701.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1073680991 - 2¹⁰ = 1073679967 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 (1073680901) 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, 416 + ... + 46341.

It is an arithmetic number, because the mean of its divisors is an integer number (268437678).

Almost surely, 2^1073680991 is an apocalyptic number.

1073680991 is a deficient number, since it is larger than the sum of its proper divisors (69721).

1073680991 is an equidigital number, since it uses as much as digits as its factorization.

1073680991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69720.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 1073680991 is about 32767.0717489372. The cubic root of 1073680991 is about 1023.9806613449.

The spelling of 1073680991 in words is "one billion, seventy-three million, six hundred eighty thousand, nine hundred ninety-one".