13772971 has 2 divisors, whose sum is σ = 13772972. Its totient is φ = 13772970.

The previous prime is 13772953. The next prime is 13772977. The reversal of 13772971 is 17927731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13772971 - 2⁹ = 13772459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13772971.

It is not a weakly prime, because it can be changed into another prime (13772977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6886485 + 6886486.

It is an arithmetic number, because the mean of its divisors is an integer number (6886486).

Almost surely, 2^13772971 is an apocalyptic number.

13772971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13772971 is an equidigital number, since it uses as much as digits as its factorization.

13772971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18522, while the sum is 37.

The square root of 13772971 is about 3711.1953599885. The cubic root of 13772971 is about 239.7043291815.

The spelling of 13772971 in words is "thirteen million, seven hundred seventy-two thousand, nine hundred seventy-one".