1378460491 has 2 divisors, whose sum is σ = 1378460492. Its totient is φ = 1378460490.

The previous prime is 1378460459. The next prime is 1378460579. The reversal of 1378460491 is 1940648731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1378460491 - 2⁵ = 1378460459 is a prime.

It is a super-2 number, since 2×1378460491² = 3800306650495922162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1378460401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689230245 + 689230246.

It is an arithmetic number, because the mean of its divisors is an integer number (689230246).

Almost surely, 2^1378460491 is an apocalyptic number.

1378460491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378460491 is an equidigital number, since it uses as much as digits as its factorization.

1378460491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1378460491 is about 37127.6243651543. The cubic root of 1378460491 is about 1112.9221199294.

The spelling of 1378460491 in words is "one billion, three hundred seventy-eight million, four hundred sixty thousand, four hundred ninety-one".