7948999831 has 2 divisors, whose sum is σ = 7948999832. Its totient is φ = 7948999830.

The previous prime is 7948999813. The next prime is 7948999897. The reversal of 7948999831 is 1389998497.

Together with previous prime (7948999813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7948999831 - 2⁷ = 7948999703 is a prime.

It is a super-2 number, since 2×7948999831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7948999231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3974499915 + 3974499916.

It is an arithmetic number, because the mean of its divisors is an integer number (3974499916).

Almost surely, 2^7948999831 is an apocalyptic number.

7948999831 is a deficient number, since it is larger than the sum of its proper divisors (1).

7948999831 is an equidigital number, since it uses as much as digits as its factorization.

7948999831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 67.

The square root of 7948999831 is about 89157.1636549750. The cubic root of 7948999831 is about 1995.7409224842.

The spelling of 7948999831 in words is "seven billion, nine hundred forty-eight million, nine hundred ninety-nine thousand, eight hundred thirty-one".