7939549491 has 8 divisors (see below), whose sum is σ = 11208775824. Its totient is φ = 4981678080.

The previous prime is 7939549477. The next prime is 7939549507. The reversal of 7939549491 is 1949459397.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7939549491 - 2⁵ = 7939549459 is a prime.

It is a super-3 number, since 3×7939549491³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (7939549441) 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, 77838670 + ... + 77838771.

It is an arithmetic number, because the mean of its divisors is an integer number (1401096978).

Almost surely, 2^7939549491 is an apocalyptic number.

7939549491 is a deficient number, since it is larger than the sum of its proper divisors (3269226333).

7939549491 is a wasteful number, since it uses less digits than its factorization.

7939549491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155677461.

The product of its digits is 11022480, while the sum is 60.

The square root of 7939549491 is about 89104.1496845124. The cubic root of 7939549491 is about 1994.9497156313.

The spelling of 7939549491 in words is "seven billion, nine hundred thirty-nine million, five hundred forty-nine thousand, four hundred ninety-one".