478931501 has 2 divisors, whose sum is σ = 478931502. Its totient is φ = 478931500.

The previous prime is 478931459. The next prime is 478931527. The reversal of 478931501 is 105139874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319515625 + 159415876 = 17875^2 + 12626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478931501 is a prime.

It is a super-2 number, since 2×478931501² = 458750765300226002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478931561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239465750 + 239465751.

It is an arithmetic number, because the mean of its divisors is an integer number (239465751).

Almost surely, 2^478931501 is an apocalyptic number.

It is an amenable number.

478931501 is a deficient number, since it is larger than the sum of its proper divisors (1).

478931501 is an equidigital number, since it uses as much as digits as its factorization.

478931501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 478931501 is about 21884.5036726904. The cubic root of 478931501 is about 782.3921199186.

It can be divided in two parts, 47893 and 1501, that added together give a palindrome (49394).

The spelling of 478931501 in words is "four hundred seventy-eight million, nine hundred thirty-one thousand, five hundred one".