387426289 has 2 divisors, whose sum is σ = 387426290. Its totient is φ = 387426288.

The previous prime is 387426239. The next prime is 387426293. The reversal of 387426289 is 982624783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208080625 + 179345664 = 14425^2 + 13392^2 .

It is a cyclic number.

It is not a de Polignac number, because 387426289 - 2⁷ = 387426161 is a prime.

It is not a weakly prime, because it can be changed into another prime (387426229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193713144 + 193713145.

It is an arithmetic number, because the mean of its divisors is an integer number (193713145).

Almost surely, 2^387426289 is an apocalyptic number.

It is an amenable number.

387426289 is a deficient number, since it is larger than the sum of its proper divisors (1).

387426289 is an equidigital number, since it uses as much as digits as its factorization.

387426289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 387426289 is about 19683.1473347125. The cubic root of 387426289 is about 729.0036378896.

The spelling of 387426289 in words is "three hundred eighty-seven million, four hundred twenty-six thousand, two hundred eighty-nine".