40473421 has 2 divisors, whose sum is σ = 40473422. Its totient is φ = 40473420.

The previous prime is 40473371. The next prime is 40473467. The reversal of 40473421 is 12437404.

40473421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39501225 + 972196 = 6285^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 40473421 - 2¹⁷ = 40342349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40423421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20236710 + 20236711.

It is an arithmetic number, because the mean of its divisors is an integer number (20236711).

Almost surely, 2^40473421 is an apocalyptic number.

It is an amenable number.

40473421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40473421 is an equidigital number, since it uses as much as digits as its factorization.

40473421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 40473421 is about 6361.8724444931. The cubic root of 40473421 is about 343.3391319807.

The spelling of 40473421 in words is "forty million, four hundred seventy-three thousand, four hundred twenty-one".