380139637 has 2 divisors, whose sum is σ = 380139638. Its totient is φ = 380139636.

The previous prime is 380139623. The next prime is 380139673. The reversal of 380139637 is 736931083.

Together with next prime (380139673) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279859441 + 100280196 = 16729^2 + 10014^2 .

It is a cyclic number.

It is not a de Polignac number, because 380139637 - 2¹⁵ = 380106869 is a prime.

It is a super-2 number, since 2×380139637² = 289012287236983538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 380139637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380139037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190069818 + 190069819.

It is an arithmetic number, because the mean of its divisors is an integer number (190069819).

Almost surely, 2^380139637 is an apocalyptic number.

It is an amenable number.

380139637 is a deficient number, since it is larger than the sum of its proper divisors (1).

380139637 is an equidigital number, since it uses as much as digits as its factorization.

380139637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 380139637 is about 19497.1699741270. The cubic root of 380139637 is about 724.4043538858.

The spelling of 380139637 in words is "three hundred eighty million, one hundred thirty-nine thousand, six hundred thirty-seven".