1238408399 has 2 divisors, whose sum is σ = 1238408400. Its totient is φ = 1238408398.

The previous prime is 1238408393. The next prime is 1238408411. The reversal of 1238408399 is 9938048321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1238408399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238408393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619204199 + 619204200.

It is an arithmetic number, because the mean of its divisors is an integer number (619204200).

Almost surely, 2^1238408399 is an apocalyptic number.

1238408399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238408399 is an equidigital number, since it uses as much as digits as its factorization.

1238408399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 1238408399 is about 35191.0272512753. The cubic root of 1238408399 is about 1073.8772193584.

The spelling of 1238408399 in words is "one billion, two hundred thirty-eight million, four hundred eight thousand, three hundred ninety-nine".