1478840887 has 2 divisors, whose sum is σ = 1478840888. Its totient is φ = 1478840886.

The previous prime is 1478840861. The next prime is 1478840893. The reversal of 1478840887 is 7880488741.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1478840887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1478820887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739420443 + 739420444.

It is an arithmetic number, because the mean of its divisors is an integer number (739420444).

Almost surely, 2^1478840887 is an apocalyptic number.

1478840887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478840887 is an equidigital number, since it uses as much as digits as its factorization.

1478840887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3211264, while the sum is 55.

The square root of 1478840887 is about 38455.7003186784. The cubic root of 1478840887 is about 1139.3062586864.

The spelling of 1478840887 in words is "one billion, four hundred seventy-eight million, eight hundred forty thousand, eight hundred eighty-seven".