13453991 has 2 divisors, whose sum is σ = 13453992. Its totient is φ = 13453990.

The previous prime is 13453981. The next prime is 13454009. The reversal of 13453991 is 19935431.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13453991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13453901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6726995 + 6726996.

It is an arithmetic number, because the mean of its divisors is an integer number (6726996).

Almost surely, 2^13453991 is an apocalyptic number.

13453991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13453991 is an equidigital number, since it uses as much as digits as its factorization.

13453991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 13453991 is about 3667.9682386847. The cubic root of 13453991 is about 237.8393509000.

The spelling of 13453991 in words is "thirteen million, four hundred fifty-three thousand, nine hundred ninety-one".