13620287 has 2 divisors, whose sum is σ = 13620288. Its totient is φ = 13620286.

The previous prime is 13620223. The next prime is 13620317. The reversal of 13620287 is 78202631.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13620287 - 2⁶ = 13620223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13620787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810143 + 6810144.

It is an arithmetic number, because the mean of its divisors is an integer number (6810144).

Almost surely, 2^13620287 is an apocalyptic number.

13620287 is a deficient number, since it is larger than the sum of its proper divisors (1).

13620287 is an equidigital number, since it uses as much as digits as its factorization.

13620287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 13620287 is about 3690.5673005650. The cubic root of 13620287 is about 238.8152666425.

The spelling of 13620287 in words is "thirteen million, six hundred twenty thousand, two hundred eighty-seven".