212749387 has 2 divisors, whose sum is σ = 212749388. Its totient is φ = 212749386.

The previous prime is 212749331. The next prime is 212749399. The reversal of 212749387 is 783947212.

212749387 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 212749387 - 2²⁷ = 78531659 is a prime.

It is not a weakly prime, because it can be changed into another prime (212749687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106374693 + 106374694.

It is an arithmetic number, because the mean of its divisors is an integer number (106374694).

Almost surely, 2^212749387 is an apocalyptic number.

212749387 is a deficient number, since it is larger than the sum of its proper divisors (1).

212749387 is an equidigital number, since it uses as much as digits as its factorization.

212749387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 212749387 is about 14585.9311324303. The cubic root of 212749387 is about 596.9749472057.

The spelling of 212749387 in words is "two hundred twelve million, seven hundred forty-nine thousand, three hundred eighty-seven".