213459887 has 2 divisors, whose sum is σ = 213459888. Its totient is φ = 213459886.

The previous prime is 213459859. The next prime is 213459913. The reversal of 213459887 is 788954312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213459887 - 2²⁴ = 196682671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213459287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106729943 + 106729944.

It is an arithmetic number, because the mean of its divisors is an integer number (106729944).

Almost surely, 2^213459887 is an apocalyptic number.

213459887 is a deficient number, since it is larger than the sum of its proper divisors (1).

213459887 is an equidigital number, since it uses as much as digits as its factorization.

213459887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 213459887 is about 14610.2664931205. The cubic root of 213459887 is about 597.6387633104.

The spelling of 213459887 in words is "two hundred thirteen million, four hundred fifty-nine thousand, eight hundred eighty-seven".