478980731 has 2 divisors, whose sum is σ = 478980732. Its totient is φ = 478980730.

The previous prime is 478980679. The next prime is 478980793. The reversal of 478980731 is 137089874.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478980731 is a prime.

It is a super-2 number, since 2×478980731² = 458845081338588722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (478980331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239490365 + 239490366.

It is an arithmetic number, because the mean of its divisors is an integer number (239490366).

Almost surely, 2^478980731 is an apocalyptic number.

478980731 is a deficient number, since it is larger than the sum of its proper divisors (1).

478980731 is an equidigital number, since it uses as much as digits as its factorization.

478980731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 478980731 is about 21885.6284122709. The cubic root of 478980731 is about 782.4189267058.

The spelling of 478980731 in words is "four hundred seventy-eight million, nine hundred eighty thousand, seven hundred thirty-one".