1378520411 has 2 divisors, whose sum is σ = 1378520412. Its totient is φ = 1378520410.

The previous prime is 1378520399. The next prime is 1378520413. The reversal of 1378520411 is 1140258731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378520411 - 2³⁰ = 304778587 is a prime.

It is a super-4 number, since 4×1378520411⁴ (a number of 38 digits) contains 4444 as substring.

Together with 1378520413, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1378520413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689260205 + 689260206.

It is an arithmetic number, because the mean of its divisors is an integer number (689260206).

Almost surely, 2^1378520411 is an apocalyptic number.

1378520411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378520411 is an equidigital number, since it uses as much as digits as its factorization.

1378520411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1378520411 is about 37128.4313027092. The cubic root of 1378520411 is about 1112.9382454858.

The spelling of 1378520411 in words is "one billion, three hundred seventy-eight million, five hundred twenty thousand, four hundred eleven".