405880859 has 2 divisors, whose sum is σ = 405880860. Its totient is φ = 405880858.

The previous prime is 405880847. The next prime is 405880927. The reversal of 405880859 is 958088504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405880859 - 2¹² = 405876763 is a prime.

It is not a weakly prime, because it can be changed into another prime (405880829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202940429 + 202940430.

It is an arithmetic number, because the mean of its divisors is an integer number (202940430).

Almost surely, 2^405880859 is an apocalyptic number.

405880859 is a deficient number, since it is larger than the sum of its proper divisors (1).

405880859 is an equidigital number, since it uses as much as digits as its factorization.

405880859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460800, while the sum is 47.

The square root of 405880859 is about 20146.4850284113. The cubic root of 405880859 is about 740.3996252748.

The spelling of 405880859 in words is "four hundred five million, eight hundred eighty thousand, eight hundred fifty-nine".