13642987 has 2 divisors, whose sum is σ = 13642988. Its totient is φ = 13642986.

The previous prime is 13642961. The next prime is 13643011. The reversal of 13642987 is 78924631.

13642987 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 a cyclic number.

It is not a de Polignac number, because 13642987 - 2⁷ = 13642859 is a prime.

It is a super-2 number, since 2×13642987² = 372262188564338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13642907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6821493 + 6821494.

It is an arithmetic number, because the mean of its divisors is an integer number (6821494).

Almost surely, 2^13642987 is an apocalyptic number.

13642987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13642987 is an equidigital number, since it uses as much as digits as its factorization.

13642987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 13642987 is about 3693.6414281844. The cubic root of 13642987 is about 238.9478653579.

The spelling of 13642987 in words is "thirteen million, six hundred forty-two thousand, nine hundred eighty-seven".