8400979169 has 4 divisors (see below), whose sum is σ = 9164704560. Its totient is φ = 7637253780.

The previous prime is 8400979151. The next prime is 8400979177. The reversal of 8400979169 is 9619790048.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8400979169 is a prime.

It is a super-2 number, since 2×8400979169² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8400979169.

It is not an unprimeable number, because it can be changed into a prime (8400970169) 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, 381862679 + ... + 381862700.

It is an arithmetic number, because the mean of its divisors is an integer number (2291176140).

Almost surely, 2^8400979169 is an apocalyptic number.

It is an amenable number.

8400979169 is a deficient number, since it is larger than the sum of its proper divisors (763725391).

8400979169 is a wasteful number, since it uses less digits than its factorization.

8400979169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763725390.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 8400979169 is about 91656.8555482895. The cubic root of 8400979169 is about 2032.8716965770.

The spelling of 8400979169 in words is "eight billion, four hundred million, nine hundred seventy-nine thousand, one hundred sixty-nine".