7821098417 has 8 divisors (see below), whose sum is σ = 8602622112. Its totient is φ = 7110088260.

The previous prime is 7821098413. The next prime is 7821098419. The reversal of 7821098417 is 7148901287.

It is a happy number.

It is not a de Polignac number, because 7821098417 - 2² = 7821098413 is a prime.

It is a super-2 number, since 2×7821098417² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7821098413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936723 + ... + 2939384.

It is an arithmetic number, because the mean of its divisors is an integer number (1075327764).

Almost surely, 2^7821098417 is an apocalyptic number.

It is an amenable number.

7821098417 is a deficient number, since it is larger than the sum of its proper divisors (781523695).

7821098417 is an equidigital number, since it uses as much as digits as its factorization.

7821098417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876140 (or 5876118 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 7821098417 is about 88436.9742641617. The cubic root of 7821098417 is about 1984.9790019922.

The spelling of 7821098417 in words is "seven billion, eight hundred twenty-one million, ninety-eight thousand, four hundred seventeen".