213539488787 has 2 divisors, whose sum is σ = 213539488788. Its totient is φ = 213539488786.

The previous prime is 213539488739. The next prime is 213539488819. The reversal of 213539488787 is 787884935312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213539488787 is a prime.

It is a super-2 number, since 2×213539488787² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213539488727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106769744393 + 106769744394.

It is an arithmetic number, because the mean of its divisors is an integer number (106769744394).

Almost surely, 2^213539488787 is an apocalyptic number.

213539488787 is a deficient number, since it is larger than the sum of its proper divisors (1).

213539488787 is an equidigital number, since it uses as much as digits as its factorization.

213539488787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 65.

The spelling of 213539488787 in words is "two hundred thirteen billion, five hundred thirty-nine million, four hundred eighty-eight thousand, seven hundred eighty-seven".