379780649 has 2 divisors, whose sum is σ = 379780650. Its totient is φ = 379780648.

The previous prime is 379780637. The next prime is 379780717. The reversal of 379780649 is 946087973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379470400 + 310249 = 19480^2 + 557^2 .

It is an emirp because it is prime and its reverse (946087973) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 379780649 - 2²⁸ = 111345193 is a prime.

It is a super-2 number, since 2×379780649² = 288466682709722402, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 379780649.

It is not a weakly prime, because it can be changed into another prime (379780249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189890324 + 189890325.

It is an arithmetic number, because the mean of its divisors is an integer number (189890325).

Almost surely, 2^379780649 is an apocalyptic number.

It is an amenable number.

379780649 is a deficient number, since it is larger than the sum of its proper divisors (1).

379780649 is an equidigital number, since it uses as much as digits as its factorization.

379780649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 379780649 is about 19487.9616430246. The cubic root of 379780649 is about 724.1762496589.

The spelling of 379780649 in words is "three hundred seventy-nine million, seven hundred eighty thousand, six hundred forty-nine".