380555657 has 2 divisors, whose sum is σ = 380555658. Its totient is φ = 380555656.

The previous prime is 380555653. The next prime is 380555683. The reversal of 380555657 is 756555083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215972416 + 164583241 = 14696^2 + 12829^2 .

It is a cyclic number.

It is not a de Polignac number, because 380555657 - 2² = 380555653 is a prime.

It is not a weakly prime, because it can be changed into another prime (380555653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190277828 + 190277829.

It is an arithmetic number, because the mean of its divisors is an integer number (190277829).

Almost surely, 2^380555657 is an apocalyptic number.

It is an amenable number.

380555657 is a deficient number, since it is larger than the sum of its proper divisors (1).

380555657 is an equidigital number, since it uses as much as digits as its factorization.

380555657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630000, while the sum is 44.

The square root of 380555657 is about 19507.8357846277. The cubic root of 380555657 is about 724.6685171910.

The spelling of 380555657 in words is "three hundred eighty million, five hundred fifty-five thousand, six hundred fifty-seven".