14139487 has 2 divisors, whose sum is σ = 14139488. Its totient is φ = 14139486.

The previous prime is 14139481. The next prime is 14139491. The reversal of 14139487 is 78493141.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14139487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14139481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7069743 + 7069744.

It is an arithmetic number, because the mean of its divisors is an integer number (7069744).

Almost surely, 2^14139487 is an apocalyptic number.

14139487 is a deficient number, since it is larger than the sum of its proper divisors (1).

14139487 is an equidigital number, since it uses as much as digits as its factorization.

14139487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 14139487 is about 3760.2509224784. The cubic root of 14139487 is about 241.8120196267.

The spelling of 14139487 in words is "fourteen million, one hundred thirty-nine thousand, four hundred eighty-seven".