387290213 has 2 divisors, whose sum is σ = 387290214. Its totient is φ = 387290212.

The previous prime is 387290177. The next prime is 387290227. The reversal of 387290213 is 312092783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260435044 + 126855169 = 16138^2 + 11263^2 .

It is a cyclic number.

It is not a de Polignac number, because 387290213 - 2¹² = 387286117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387290263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193645106 + 193645107.

It is an arithmetic number, because the mean of its divisors is an integer number (193645107).

Almost surely, 2^387290213 is an apocalyptic number.

It is an amenable number.

387290213 is a deficient number, since it is larger than the sum of its proper divisors (1).

387290213 is an equidigital number, since it uses as much as digits as its factorization.

387290213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 387290213 is about 19679.6903684992. The cubic root of 387290213 is about 728.9182784134.

The spelling of 387290213 in words is "three hundred eighty-seven million, two hundred ninety thousand, two hundred thirteen".