1373088991 has 2 divisors, whose sum is σ = 1373088992. Its totient is φ = 1373088990.

The previous prime is 1373088989. The next prime is 1373089009. The reversal of 1373088991 is 1998803731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1373088991 - 2¹ = 1373088989 is a prime.

Together with 1373088989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373088911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686544495 + 686544496.

It is an arithmetic number, because the mean of its divisors is an integer number (686544496).

Almost surely, 2^1373088991 is an apocalyptic number.

1373088991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373088991 is an equidigital number, since it uses as much as digits as its factorization.

1373088991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 1373088991 is about 37055.2154358870. The cubic root of 1373088991 is about 1111.4746493537.

The spelling of 1373088991 in words is "one billion, three hundred seventy-three million, eighty-eight thousand, nine hundred ninety-one".