387272891 has 2 divisors, whose sum is σ = 387272892. Its totient is φ = 387272890.

The previous prime is 387272881. The next prime is 387272917. The reversal of 387272891 is 198272783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 387272891 - 2¹⁰ = 387271867 is a prime.

It is not a weakly prime, because it can be changed into another prime (387272861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193636445 + 193636446.

It is an arithmetic number, because the mean of its divisors is an integer number (193636446).

Almost surely, 2^387272891 is an apocalyptic number.

387272891 is a deficient number, since it is larger than the sum of its proper divisors (1).

387272891 is an equidigital number, since it uses as much as digits as its factorization.

387272891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 387272891 is about 19679.2502651905. The cubic root of 387272891 is about 728.9074110154.

The spelling of 387272891 in words is "three hundred eighty-seven million, two hundred seventy-two thousand, eight hundred ninety-one".