387213077 has 2 divisors, whose sum is σ = 387213078. Its totient is φ = 387213076.

The previous prime is 387213067. The next prime is 387213109. The reversal of 387213077 is 770312783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385690321 + 1522756 = 19639^2 + 1234^2 .

It is an emirp because it is prime and its reverse (770312783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387213077 - 2¹⁰ = 387212053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 387213077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387213067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193606538 + 193606539.

It is an arithmetic number, because the mean of its divisors is an integer number (193606539).

Almost surely, 2^387213077 is an apocalyptic number.

It is an amenable number.

387213077 is a deficient number, since it is larger than the sum of its proper divisors (1).

387213077 is an equidigital number, since it uses as much as digits as its factorization.

387213077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 387213077 is about 19677.7304839760. The cubic root of 387213077 is about 728.8698826870.

The spelling of 387213077 in words is "three hundred eighty-seven million, two hundred thirteen thousand, seventy-seven".