406708387 has 2 divisors, whose sum is σ = 406708388. Its totient is φ = 406708386.

The previous prime is 406708369. The next prime is 406708469. The reversal of 406708387 is 783807604.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406708387 is a prime.

It is a super-2 number, since 2×406708387² = 330823424112283538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (406708327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203354193 + 203354194.

It is an arithmetic number, because the mean of its divisors is an integer number (203354194).

Almost surely, 2^406708387 is an apocalyptic number.

406708387 is a deficient number, since it is larger than the sum of its proper divisors (1).

406708387 is an equidigital number, since it uses as much as digits as its factorization.

406708387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 406708387 is about 20167.0123468996. The cubic root of 406708387 is about 740.9024702826.

The spelling of 406708387 in words is "four hundred six million, seven hundred eight thousand, three hundred eighty-seven".