212523739 has 2 divisors, whose sum is σ = 212523740. Its totient is φ = 212523738.

The previous prime is 212523713. The next prime is 212523743. The reversal of 212523739 is 937325212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212523739 - 2¹³ = 212515547 is a prime.

It is not a weakly prime, because it can be changed into another prime (212523769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106261869 + 106261870.

It is an arithmetic number, because the mean of its divisors is an integer number (106261870).

Almost surely, 2^212523739 is an apocalyptic number.

212523739 is a deficient number, since it is larger than the sum of its proper divisors (1).

212523739 is an equidigital number, since it uses as much as digits as its factorization.

212523739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 212523739 is about 14578.1939553567. The cubic root of 212523739 is about 596.7638163892.

The spelling of 212523739 in words is "two hundred twelve million, five hundred twenty-three thousand, seven hundred thirty-nine".