380660491 has 2 divisors, whose sum is σ = 380660492. Its totient is φ = 380660490.

The previous prime is 380660479. The next prime is 380660503. The reversal of 380660491 is 194066083.

It is a balanced prime because it is at equal distance from previous prime (380660479) and next prime (380660503).

It is an emirp because it is prime and its reverse (194066083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 380660491 - 2¹³ = 380652299 is a prime.

It is a super-2 number, since 2×380660491² = 289804818816722162, which contains 22 as substring.

It is equal to p_20358982 and since 380660491 and 20358982 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 380660491.

It is not a weakly prime, because it can be changed into another prime (380660411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190330245 + 190330246.

It is an arithmetic number, because the mean of its divisors is an integer number (190330246).

Almost surely, 2^380660491 is an apocalyptic number.

380660491 is a deficient number, since it is larger than the sum of its proper divisors (1).

380660491 is an equidigital number, since it uses as much as digits as its factorization.

380660491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 380660491 is about 19510.5225711666. The cubic root of 380660491 is about 724.7350540414.

The spelling of 380660491 in words is "three hundred eighty million, six hundred sixty thousand, four hundred ninety-one".