1247171479 has 2 divisors, whose sum is σ = 1247171480. Its totient is φ = 1247171478.

The previous prime is 1247171467. The next prime is 1247171501. The reversal of 1247171479 is 9741717421.

It is a weak prime.

It is an emirp because it is prime and its reverse (9741717421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1247171479 - 2¹¹ = 1247169431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247171279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623585739 + 623585740.

It is an arithmetic number, because the mean of its divisors is an integer number (623585740).

Almost surely, 2^1247171479 is an apocalyptic number.

1247171479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247171479 is an equidigital number, since it uses as much as digits as its factorization.

1247171479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 43.

The square root of 1247171479 is about 35315.3150771730. The cubic root of 1247171479 is about 1076.4042162182.

The spelling of 1247171479 in words is "one billion, two hundred forty-seven million, one hundred seventy-one thousand, four hundred seventy-nine".