212319973 has 2 divisors, whose sum is σ = 212319974. Its totient is φ = 212319972.

The previous prime is 212319971. The next prime is 212319979. The reversal of 212319973 is 379913212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205549569 + 6770404 = 14337^2 + 2602^2 .

It is a cyclic number.

It is not a de Polignac number, because 212319973 - 2¹ = 212319971 is a prime.

Together with 212319971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212319971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106159986 + 106159987.

It is an arithmetic number, because the mean of its divisors is an integer number (106159987).

Almost surely, 2^212319973 is an apocalyptic number.

It is an amenable number.

212319973 is a deficient number, since it is larger than the sum of its proper divisors (1).

212319973 is an equidigital number, since it uses as much as digits as its factorization.

212319973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 37.

The square root of 212319973 is about 14571.2035535847. The cubic root of 212319973 is about 596.5730313343.

The spelling of 212319973 in words is "two hundred twelve million, three hundred nineteen thousand, nine hundred seventy-three".