212970997 has 2 divisors, whose sum is σ = 212970998. Its totient is φ = 212970996.

The previous prime is 212970913. The next prime is 212971043. The reversal of 212970997 is 799079212.

It is an a-pointer prime, because the next prime (212971043) can be obtained adding 212970997 to its sum of digits (46).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205320241 + 7650756 = 14329^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 212970997 - 2¹¹ = 212968949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212970097) 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, 106485498 + 106485499.

It is an arithmetic number, because the mean of its divisors is an integer number (106485499).

Almost surely, 2^212970997 is an apocalyptic number.

It is an amenable number.

212970997 is a deficient number, since it is larger than the sum of its proper divisors (1).

212970997 is an equidigital number, since it uses as much as digits as its factorization.

212970997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 212970997 is about 14593.5258590924. The cubic root of 212970997 is about 597.1821545547.

The spelling of 212970997 in words is "two hundred twelve million, nine hundred seventy thousand, nine hundred ninety-seven".