387901289 has 2 divisors, whose sum is σ = 387901290. Its totient is φ = 387901288.

The previous prime is 387901277. The next prime is 387901301. The reversal of 387901289 is 982109783.

It is a balanced prime because it is at equal distance from previous prime (387901277) and next prime (387901301).

It can be written as a sum of positive squares in only one way, i.e., 387105625 + 795664 = 19675^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 387901289 - 2⁴ = 387901273 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (387901259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193950644 + 193950645.

It is an arithmetic number, because the mean of its divisors is an integer number (193950645).

Almost surely, 2^387901289 is an apocalyptic number.

It is an amenable number.

387901289 is a deficient number, since it is larger than the sum of its proper divisors (1).

387901289 is an equidigital number, since it uses as much as digits as its factorization.

387901289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 387901289 is about 19695.2097983241. The cubic root of 387901289 is about 729.3014453417.

The spelling of 387901289 in words is "three hundred eighty-seven million, nine hundred one thousand, two hundred eighty-nine".