408680387 has 2 divisors, whose sum is σ = 408680388. Its totient is φ = 408680386.

The previous prime is 408680381. The next prime is 408680411. The reversal of 408680387 is 783086804.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 408680387 - 2²⁶ = 341571523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (408680381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204340193 + 204340194.

It is an arithmetic number, because the mean of its divisors is an integer number (204340194).

Almost surely, 2^408680387 is an apocalyptic number.

408680387 is a deficient number, since it is larger than the sum of its proper divisors (1).

408680387 is an equidigital number, since it uses as much as digits as its factorization.

408680387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 408680387 is about 20215.8449489503. The cubic root of 408680387 is about 742.0980071451.

The spelling of 408680387 in words is "four hundred eight million, six hundred eighty thousand, three hundred eighty-seven".