407478397 has 2 divisors, whose sum is σ = 407478398. Its totient is φ = 407478396.

The previous prime is 407478371. The next prime is 407478413. The reversal of 407478397 is 793874704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317873241 + 89605156 = 17829^2 + 9466^2 .

It is a cyclic number.

It is not a de Polignac number, because 407478397 - 2¹⁵ = 407445629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 407478397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (407478307) 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, 203739198 + 203739199.

It is an arithmetic number, because the mean of its divisors is an integer number (203739199).

Almost surely, 2^407478397 is an apocalyptic number.

It is an amenable number.

407478397 is a deficient number, since it is larger than the sum of its proper divisors (1).

407478397 is an equidigital number, since it uses as much as digits as its factorization.

407478397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The square root of 407478397 is about 20186.0941491909. The cubic root of 407478397 is about 741.3697523850.

The spelling of 407478397 in words is "four hundred seven million, four hundred seventy-eight thousand, three hundred ninety-seven".