405423091 has 2 divisors, whose sum is σ = 405423092. Its totient is φ = 405423090.

The previous prime is 405423059. The next prime is 405423113. The reversal of 405423091 is 190324504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405423091 - 2⁵ = 405423059 is a prime.

It is not a weakly prime, because it can be changed into another prime (405423041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202711545 + 202711546.

It is an arithmetic number, because the mean of its divisors is an integer number (202711546).

Almost surely, 2^405423091 is an apocalyptic number.

405423091 is a deficient number, since it is larger than the sum of its proper divisors (1).

405423091 is an equidigital number, since it uses as much as digits as its factorization.

405423091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 405423091 is about 20135.1208340054. The cubic root of 405423091 is about 740.1211701995.

Adding to 405423091 its reverse (190324504), we get a palindrome (595747595).

The spelling of 405423091 in words is "four hundred five million, four hundred twenty-three thousand, ninety-one".