478093531 has 2 divisors, whose sum is σ = 478093532. Its totient is φ = 478093530.

The previous prime is 478093519. The next prime is 478093537. The reversal of 478093531 is 135390874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478093531 - 2⁷ = 478093403 is a prime.

It is a super-2 number, since 2×478093531² = 457146848768095922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (478093537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239046765 + 239046766.

It is an arithmetic number, because the mean of its divisors is an integer number (239046766).

Almost surely, 2^478093531 is an apocalyptic number.

478093531 is a deficient number, since it is larger than the sum of its proper divisors (1).

478093531 is an equidigital number, since it uses as much as digits as its factorization.

478093531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 478093531 is about 21865.3500086324. The cubic root of 478093531 is about 781.9355453229.

The spelling of 478093531 in words is "four hundred seventy-eight million, ninety-three thousand, five hundred thirty-one".