1478990717 has 2 divisors, whose sum is σ = 1478990718. Its totient is φ = 1478990716.

The previous prime is 1478990657. The next prime is 1478990741. The reversal of 1478990717 is 7170998741.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024704121 + 454286596 = 32011^2 + 21314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1478990717 - 2¹⁰ = 1478989693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1478990767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739495358 + 739495359.

It is an arithmetic number, because the mean of its divisors is an integer number (739495359).

Almost surely, 2^1478990717 is an apocalyptic number.

It is an amenable number.

1478990717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478990717 is an equidigital number, since it uses as much as digits as its factorization.

1478990717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 53.

The square root of 1478990717 is about 38457.6483550412. The cubic root of 1478990717 is about 1139.3447339755.

The spelling of 1478990717 in words is "one billion, four hundred seventy-eight million, nine hundred ninety thousand, seven hundred seventeen".