380949557 has 2 divisors, whose sum is σ = 380949558. Its totient is φ = 380949556.

The previous prime is 380949511. The next prime is 380949559. The reversal of 380949557 is 755949083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369177796 + 11771761 = 19214^2 + 3431^2 .

It is a cyclic number.

It is not a de Polignac number, because 380949557 - 2⁶ = 380949493 is a prime.

Together with 380949559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380949559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190474778 + 190474779.

It is an arithmetic number, because the mean of its divisors is an integer number (190474779).

Almost surely, 2^380949557 is an apocalyptic number.

It is an amenable number.

380949557 is a deficient number, since it is larger than the sum of its proper divisors (1).

380949557 is an equidigital number, since it uses as much as digits as its factorization.

380949557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 380949557 is about 19517.9291165841. The cubic root of 380949557 is about 724.9184574164.

The spelling of 380949557 in words is "three hundred eighty million, nine hundred forty-nine thousand, five hundred fifty-seven".