212312987 has 2 divisors, whose sum is σ = 212312988. Its totient is φ = 212312986.

The previous prime is 212312963. The next prime is 212313029. The reversal of 212312987 is 789213212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212312987 - 2⁶ = 212312923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212312917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106156493 + 106156494.

It is an arithmetic number, because the mean of its divisors is an integer number (106156494).

Almost surely, 2^212312987 is an apocalyptic number.

212312987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212312987 is an equidigital number, since it uses as much as digits as its factorization.

212312987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 212312987 is about 14570.9638322247. The cubic root of 212312987 is about 596.5664882148.

The spelling of 212312987 in words is "two hundred twelve million, three hundred twelve thousand, nine hundred eighty-seven".