1378437131 has 2 divisors, whose sum is σ = 1378437132. Its totient is φ = 1378437130.

The previous prime is 1378437107. The next prime is 1378437133. The reversal of 1378437131 is 1317348731.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378437131 - 2¹⁰ = 1378436107 is a prime.

It is a super-2 number, since 2×1378437131² = 3800177848239022322, which contains 22 as substring.

Together with 1378437133, 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 (1378437133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689218565 + 689218566.

It is an arithmetic number, because the mean of its divisors is an integer number (689218566).

Almost surely, 2^1378437131 is an apocalyptic number.

1378437131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378437131 is an equidigital number, since it uses as much as digits as its factorization.

1378437131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 1378437131 is about 37127.3097732653. The cubic root of 1378437131 is about 1112.9158332040.

The spelling of 1378437131 in words is "one billion, three hundred seventy-eight million, four hundred thirty-seven thousand, one hundred thirty-one".