38879999 has 2 divisors, whose sum is σ = 38880000. Its totient is φ = 38879998.

The previous prime is 38879993. The next prime is 38880029. The reversal of 38879999 is 99997883.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38879999 - 2¹⁶ = 38814463 is a prime.

It is a Chen prime.

38879999 is a modest number, since divided by 9999 gives 3887 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38879993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19439999 + 19440000.

It is an arithmetic number, because the mean of its divisors is an integer number (19440000).

Almost surely, 2^38879999 is an apocalyptic number.

38879999 is a deficient number, since it is larger than the sum of its proper divisors (1).

38879999 is an equidigital number, since it uses as much as digits as its factorization.

38879999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 62.

The square root of 38879999 is about 6235.3828270604. The cubic root of 38879999 is about 338.7729674927.

The spelling of 38879999 in words is "thirty-eight million, eight hundred seventy-nine thousand, nine hundred ninety-nine".