7899923011 has 4 divisors (see below), whose sum is σ = 7900101352. Its totient is φ = 7899744672.

The previous prime is 7899922957. The next prime is 7899923039. The reversal of 7899923011 is 1103299987.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7899923011 - 2¹³ = 7899914819 is a prime.

It is a super-2 number, since 2×7899923011² (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 (7899923071) 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, 33835 + ... + 130171.

It is an arithmetic number, because the mean of its divisors is an integer number (1975025338).

Almost surely, 2^7899923011 is an apocalyptic number.

7899923011 is a deficient number, since it is larger than the sum of its proper divisors (178341).

7899923011 is an equidigital number, since it uses as much as digits as its factorization.

7899923011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178340.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 7899923011 is about 88881.5110751387. The cubic root of 7899923011 is about 1991.6252314911.

The spelling of 7899923011 in words is "seven billion, eight hundred ninety-nine million, nine hundred twenty-three thousand, eleven".