212078407 has 2 divisors, whose sum is σ = 212078408. Its totient is φ = 212078406.

The previous prime is 212078401. The next prime is 212078411. The reversal of 212078407 is 704870212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212078407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212078401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106039203 + 106039204.

It is an arithmetic number, because the mean of its divisors is an integer number (106039204).

Almost surely, 2^212078407 is an apocalyptic number.

212078407 is a deficient number, since it is larger than the sum of its proper divisors (1).

212078407 is an equidigital number, since it uses as much as digits as its factorization.

212078407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 212078407 is about 14562.9120370893. The cubic root of 212078407 is about 596.3466961360.

The spelling of 212078407 in words is "two hundred twelve million, seventy-eight thousand, four hundred seven".