478981387 has 2 divisors, whose sum is σ = 478981388. Its totient is φ = 478981386.

The previous prime is 478981379. The next prime is 478981421. The reversal of 478981387 is 783189874.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 478981387 - 2³ = 478981379 is a prime.

It is not a weakly prime, because it can be changed into another prime (478981787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239490693 + 239490694.

It is an arithmetic number, because the mean of its divisors is an integer number (239490694).

Almost surely, 2^478981387 is an apocalyptic number.

478981387 is a deficient number, since it is larger than the sum of its proper divisors (1).

478981387 is an equidigital number, since it uses as much as digits as its factorization.

478981387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 55.

The square root of 478981387 is about 21885.6433992698. The cubic root of 478981387 is about 782.4192838994.

The spelling of 478981387 in words is "four hundred seventy-eight million, nine hundred eighty-one thousand, three hundred eighty-seven".