405421927 has 2 divisors, whose sum is σ = 405421928. Its totient is φ = 405421926.

The previous prime is 405421871. The next prime is 405421949. The reversal of 405421927 is 729124504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405421927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405421892 and 405421901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405421957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202710963 + 202710964.

It is an arithmetic number, because the mean of its divisors is an integer number (202710964).

Almost surely, 2^405421927 is an apocalyptic number.

405421927 is a deficient number, since it is larger than the sum of its proper divisors (1).

405421927 is an equidigital number, since it uses as much as digits as its factorization.

405421927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 405421927 is about 20135.0919292662. The cubic root of 405421927 is about 740.1204618844.

The spelling of 405421927 in words is "four hundred five million, four hundred twenty-one thousand, nine hundred twenty-seven".