212537389 has 2 divisors, whose sum is σ = 212537390. Its totient is φ = 212537388.

The previous prime is 212537357. The next prime is 212537459. The reversal of 212537389 is 983735212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157703364 + 54834025 = 12558^2 + 7405^2 .

It is a cyclic number.

It is not a de Polignac number, because 212537389 - 2⁵ = 212537357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212537189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106268694 + 106268695.

It is an arithmetic number, because the mean of its divisors is an integer number (106268695).

Almost surely, 2^212537389 is an apocalyptic number.

It is an amenable number.

212537389 is a deficient number, since it is larger than the sum of its proper divisors (1).

212537389 is an equidigital number, since it uses as much as digits as its factorization.

212537389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 212537389 is about 14578.6621128278. The cubic root of 212537389 is about 596.7765924548.

The spelling of 212537389 in words is "two hundred twelve million, five hundred thirty-seven thousand, three hundred eighty-nine".