13019971 has 2 divisors, whose sum is σ = 13019972. Its totient is φ = 13019970.

The previous prime is 13019957. The next prime is 13019983. The reversal of 13019971 is 17991031.

13019971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (17991031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13019971 - 2⁹ = 13019459 is a prime.

It is equal to p₈₅₀₄₈₆ and since 13019971 and 850486 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13010971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6509985 + 6509986.

It is an arithmetic number, because the mean of its divisors is an integer number (6509986).

Almost surely, 2^13019971 is an apocalyptic number.

13019971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13019971 is an equidigital number, since it uses as much as digits as its factorization.

13019971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 13019971 is about 3608.3196920450. The cubic root of 13019971 is about 235.2538135905.

The spelling of 13019971 in words is "thirteen million, nineteen thousand, nine hundred seventy-one".