380720887 has 2 divisors, whose sum is σ = 380720888. Its totient is φ = 380720886.

The previous prime is 380720881. The next prime is 380720911. The reversal of 380720887 is 788027083.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 380720887 - 2¹⁹ = 380196599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380720881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190360443 + 190360444.

It is an arithmetic number, because the mean of its divisors is an integer number (190360444).

Almost surely, 2^380720887 is an apocalyptic number.

380720887 is a deficient number, since it is larger than the sum of its proper divisors (1).

380720887 is an equidigital number, since it uses as much as digits as its factorization.

380720887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 380720887 is about 19512.0702899513. The cubic root of 380720887 is about 724.7733810937.

The spelling of 380720887 in words is "three hundred eighty million, seven hundred twenty thousand, eight hundred eighty-seven".