7928549249 has 4 divisors (see below), whose sum is σ = 7932251136. Its totient is φ = 7924847364.

The previous prime is 7928549231. The next prime is 7928549263. The reversal of 7928549249 is 9429458297.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9429458297 = 7 ⋅1347065471.

It is a cyclic number.

It is not a de Polignac number, because 7928549249 - 2³² = 3633581953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7928545249) 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, 1847729 + ... + 1852014.

It is an arithmetic number, because the mean of its divisors is an integer number (1983062784).

Almost surely, 2^7928549249 is an apocalyptic number.

It is an amenable number.

7928549249 is a deficient number, since it is larger than the sum of its proper divisors (3701887).

7928549249 is a wasteful number, since it uses less digits than its factorization.

7928549249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701886.

The product of its digits is 13063680, while the sum is 59.

The square root of 7928549249 is about 89042.4014107886. The cubic root of 7928549249 is about 1994.0279558439.

The spelling of 7928549249 in words is "seven billion, nine hundred twenty-eight million, five hundred forty-nine thousand, two hundred forty-nine".