13028937991 has 2 divisors, whose sum is σ = 13028937992. Its totient is φ = 13028937990.

The previous prime is 13028937979. The next prime is 13028938033. The reversal of 13028937991 is 19973982031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13028937991 - 2¹³ = 13028929799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13028937941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6514468995 + 6514468996.

It is an arithmetic number, because the mean of its divisors is an integer number (6514468996).

Almost surely, 2^13028937991 is an apocalyptic number.

13028937991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13028937991 is an equidigital number, since it uses as much as digits as its factorization.

13028937991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 52.

The spelling of 13028937991 in words is "thirteen billion, twenty-eight million, nine hundred thirty-seven thousand, nine hundred ninety-one".