2128629931 has 2 divisors, whose sum is σ = 2128629932. Its totient is φ = 2128629930.

The previous prime is 2128629917. The next prime is 2128629947. The reversal of 2128629931 is 1399268212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2128629931 - 2⁷ = 2128629803 is a prime.

It is a super-2 number, since 2×2128629931² = 9062130766298129522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2128629901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064314965 + 1064314966.

It is an arithmetic number, because the mean of its divisors is an integer number (1064314966).

Almost surely, 2^2128629931 is an apocalyptic number.

2128629931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128629931 is an equidigital number, since it uses as much as digits as its factorization.

2128629931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 2128629931 is about 46137.0776165981. The cubic root of 2128629931 is about 1286.3724239760.

The spelling of 2128629931 in words is "two billion, one hundred twenty-eight million, six hundred twenty-nine thousand, nine hundred thirty-one".