380473661 has 2 divisors, whose sum is σ = 380473662. Its totient is φ = 380473660.

The previous prime is 380473631. The next prime is 380473663. The reversal of 380473661 is 166374083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319336900 + 61136761 = 17870^2 + 7819^2 .

It is an emirp because it is prime and its reverse (166374083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 380473661 - 2²² = 376279357 is a prime.

Together with 380473663, 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 (380473663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190236830 + 190236831.

It is an arithmetic number, because the mean of its divisors is an integer number (190236831).

Almost surely, 2^380473661 is an apocalyptic number.

It is an amenable number.

380473661 is a deficient number, since it is larger than the sum of its proper divisors (1).

380473661 is an equidigital number, since it uses as much as digits as its factorization.

380473661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 380473661 is about 19505.7340543749. The cubic root of 380473661 is about 724.6164668214.

The spelling of 380473661 in words is "three hundred eighty million, four hundred seventy-three thousand, six hundred sixty-one".