338879987 has 2 divisors, whose sum is σ = 338879988. Its totient is φ = 338879986.

The previous prime is 338879969. The next prime is 338880007. The reversal of 338879987 is 789978833.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 338879987 - 2¹² = 338875891 is a prime.

It is a super-2 number, since 2×338879987² = 229679291178240338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338879287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169439993 + 169439994.

It is an arithmetic number, because the mean of its divisors is an integer number (169439994).

Almost surely, 2^338879987 is an apocalyptic number.

338879987 is a deficient number, since it is larger than the sum of its proper divisors (1).

338879987 is an equidigital number, since it uses as much as digits as its factorization.

338879987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 62.

The square root of 338879987 is about 18408.6932453121. The cubic root of 338879987 is about 697.1859727277.

The spelling of 338879987 in words is "three hundred thirty-eight million, eight hundred seventy-nine thousand, nine hundred eighty-seven".