1478170891 has 2 divisors, whose sum is σ = 1478170892. Its totient is φ = 1478170890.

The previous prime is 1478170853. The next prime is 1478170913. The reversal of 1478170891 is 1980718741.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1980718741) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1478170891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1478170591) 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, 739085445 + 739085446.

It is an arithmetic number, because the mean of its divisors is an integer number (739085446).

Almost surely, 2^1478170891 is an apocalyptic number.

1478170891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478170891 is an equidigital number, since it uses as much as digits as its factorization.

1478170891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 46.

The square root of 1478170891 is about 38446.9880614854. The cubic root of 1478170891 is about 1139.1341766302.

The spelling of 1478170891 in words is "one billion, four hundred seventy-eight million, one hundred seventy thousand, eight hundred ninety-one".