1438878611 has 2 divisors, whose sum is σ = 1438878612. Its totient is φ = 1438878610.

The previous prime is 1438878583. The next prime is 1438878613. The reversal of 1438878611 is 1168788341.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438878611 is a prime.

It is a super-5 number, since 5×1438878611⁵ (a number of 47 digits) contains 55555 as substring.

Together with 1438878613, 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 (1438878613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719439305 + 719439306.

It is an arithmetic number, because the mean of its divisors is an integer number (719439306).

Almost surely, 2^1438878611 is an apocalyptic number.

1438878611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438878611 is an equidigital number, since it uses as much as digits as its factorization.

1438878611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 47.

The square root of 1438878611 is about 37932.5534468746. The cubic root of 1438878611 is about 1128.9500286858.

The spelling of 1438878611 in words is "one billion, four hundred thirty-eight million, eight hundred seventy-eight thousand, six hundred eleven".