380657569 has 4 divisors (see below), whose sum is σ = 380989440. Its totient is φ = 380325700.

The previous prime is 380657513. The next prime is 380657579. The reversal of 380657569 is 965756083.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 965756083 = 1759 ⋅549037.

It is a cyclic number.

It is not a de Polignac number, because 380657569 - 2¹⁵ = 380624801 is a prime.

It is a super-2 number, since 2×380657569² = 289800369673979522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (380657579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164209 + ... + 166510.

It is an arithmetic number, because the mean of its divisors is an integer number (95247360).

Almost surely, 2^380657569 is an apocalyptic number.

It is an amenable number.

380657569 is a deficient number, since it is larger than the sum of its proper divisors (331871).

380657569 is a wasteful number, since it uses less digits than its factorization.

380657569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331870.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 380657569 is about 19510.4476883541. The cubic root of 380657569 is about 724.7331996494.

The spelling of 380657569 in words is "three hundred eighty million, six hundred fifty-seven thousand, five hundred sixty-nine".