213513787 has 2 divisors, whose sum is σ = 213513788. Its totient is φ = 213513786.

The previous prime is 213513763. The next prime is 213513799. The reversal of 213513787 is 787315312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213513787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213513737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106756893 + 106756894.

It is an arithmetic number, because the mean of its divisors is an integer number (106756894).

Almost surely, 2^213513787 is an apocalyptic number.

213513787 is a deficient number, since it is larger than the sum of its proper divisors (1).

213513787 is an equidigital number, since it uses as much as digits as its factorization.

213513787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 213513787 is about 14612.1109700139. The cubic root of 213513787 is about 597.6890616262.

The spelling of 213513787 in words is "two hundred thirteen million, five hundred thirteen thousand, seven hundred eighty-seven".