13920587 has 2 divisors, whose sum is σ = 13920588. Its totient is φ = 13920586.

The previous prime is 13920541. The next prime is 13920649. The reversal of 13920587 is 78502931.

13920587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13920587 is a prime.

It is not a weakly prime, because it can be changed into another prime (13920187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960293 + 6960294.

It is an arithmetic number, because the mean of its divisors is an integer number (6960294).

Almost surely, 2^13920587 is an apocalyptic number.

13920587 is a deficient number, since it is larger than the sum of its proper divisors (1).

13920587 is an equidigital number, since it uses as much as digits as its factorization.

13920587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 13920587 is about 3731.0302866635. The cubic root of 13920587 is about 240.5576557928.

The spelling of 13920587 in words is "thirteen million, nine hundred twenty thousand, five hundred eighty-seven".