7949965999 has 4 divisors (see below), whose sum is σ = 8050598560. Its totient is φ = 7849333440.

The previous prime is 7949965979. The next prime is 7949966021. The reversal of 7949965999 is 9995699497.

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 7949965999 - 2⁵ = 7949965967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7949965949) 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, 50316162 + ... + 50316319.

It is an arithmetic number, because the mean of its divisors is an integer number (2012649640).

Almost surely, 2^7949965999 is an apocalyptic number.

7949965999 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

7949965999 is a deficient number, since it is larger than the sum of its proper divisors (100632561).

7949965999 is a wasteful number, since it uses less digits than its factorization.

7949965999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100632560.

The product of its digits is 446410440, while the sum is 76.

The square root of 7949965999 is about 89162.5818322911. The cubic root of 7949965999 is about 1995.8217772223.

The spelling of 7949965999 in words is "seven billion, nine hundred forty-nine million, nine hundred sixty-five thousand, nine hundred ninety-nine".