1071171979 has 4 divisors (see below), whose sum is σ = 1077156360. Its totient is φ = 1065187600.

The previous prime is 1071171973. The next prime is 1071172007. The reversal of 1071171979 is 9791711701.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1071171979 - 2¹³ = 1071163787 is a prime.

It is a super-2 number, since 2×1071171979² = 2294818817189552882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1071171973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2991922 + ... + 2992279.

It is an arithmetic number, because the mean of its divisors is an integer number (269289090).

Almost surely, 2^1071171979 is an apocalyptic number.

1071171979 is a deficient number, since it is larger than the sum of its proper divisors (5984381).

1071171979 is an equidigital number, since it uses as much as digits as its factorization.

1071171979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984380.

The product of its (nonzero) digits is 27783, while the sum is 43.

The square root of 1071171979 is about 32728.7637866144. The cubic root of 1071171979 is about 1023.1824156717.

The spelling of 1071171979 in words is "one billion, seventy-one million, one hundred seventy-one thousand, nine hundred seventy-nine".