1478021879 has 2 divisors, whose sum is σ = 1478021880. Its totient is φ = 1478021878.

The previous prime is 1478021861. The next prime is 1478021891. The reversal of 1478021879 is 9781208741.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1478021879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1478021899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739010939 + 739010940.

It is an arithmetic number, because the mean of its divisors is an integer number (739010940).

Almost surely, 2^1478021879 is an apocalyptic number.

1478021879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478021879 is an equidigital number, since it uses as much as digits as its factorization.

1478021879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 1478021879 is about 38445.0501235205. The cubic root of 1478021879 is about 1139.0958972568.

The spelling of 1478021879 in words is "one billion, four hundred seventy-eight million, twenty-one thousand, eight hundred seventy-nine".