406049939 has 2 divisors, whose sum is σ = 406049940. Its totient is φ = 406049938.

The previous prime is 406049927. The next prime is 406049971. The reversal of 406049939 is 939940604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406049939 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406049939.

It is not a weakly prime, because it can be changed into another prime (406049339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203024969 + 203024970.

It is an arithmetic number, because the mean of its divisors is an integer number (203024970).

Almost surely, 2^406049939 is an apocalyptic number.

406049939 is a deficient number, since it is larger than the sum of its proper divisors (1).

406049939 is an equidigital number, since it uses as much as digits as its factorization.

406049939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 406049939 is about 20150.6808569835. The cubic root of 406049939 is about 740.5024217700.

The spelling of 406049939 in words is "four hundred six million, forty-nine thousand, nine hundred thirty-nine".