380814661 has 2 divisors, whose sum is σ = 380814662. Its totient is φ = 380814660.

The previous prime is 380814589. The next prime is 380814673. The reversal of 380814661 is 166418083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380484036 + 330625 = 19506^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 380814661 - 2²¹ = 378717509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 380814661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380814361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190407330 + 190407331.

It is an arithmetic number, because the mean of its divisors is an integer number (190407331).

Almost surely, 2^380814661 is an apocalyptic number.

It is an amenable number.

380814661 is a deficient number, since it is larger than the sum of its proper divisors (1).

380814661 is an equidigital number, since it uses as much as digits as its factorization.

380814661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 380814661 is about 19514.4731161259. The cubic root of 380814661 is about 724.8328816552.

The spelling of 380814661 in words is "three hundred eighty million, eight hundred fourteen thousand, six hundred sixty-one".