406667537 has 2 divisors, whose sum is σ = 406667538. Its totient is φ = 406667536.

The previous prime is 406667533. The next prime is 406667567. The reversal of 406667537 is 735766604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404774161 + 1893376 = 20119^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 406667537 - 2² = 406667533 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406667533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203333768 + 203333769.

It is an arithmetic number, because the mean of its divisors is an integer number (203333769).

Almost surely, 2^406667537 is an apocalyptic number.

It is an amenable number.

406667537 is a deficient number, since it is larger than the sum of its proper divisors (1).

406667537 is an equidigital number, since it uses as much as digits as its factorization.

406667537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 44.

The square root of 406667537 is about 20165.9995289100. Note that the first 3 decimals coincide. The cubic root of 406667537 is about 740.8776639100.

The spelling of 406667537 in words is "four hundred six million, six hundred sixty-seven thousand, five hundred thirty-seven".