2238649991 has 2 divisors, whose sum is σ = 2238649992. Its totient is φ = 2238649990.

The previous prime is 2238649943. The next prime is 2238650017. The reversal of 2238649991 is 1999468322.

2238649991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2238649991 - 2¹⁰ = 2238648967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2238649691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119324995 + 1119324996.

It is an arithmetic number, because the mean of its divisors is an integer number (1119324996).

Almost surely, 2^2238649991 is an apocalyptic number.

2238649991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2238649991 is an equidigital number, since it uses as much as digits as its factorization.

2238649991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 53.

The square root of 2238649991 is about 47314.3740421450. The cubic root of 2238649991 is about 1308.1636159565.

The spelling of 2238649991 in words is "two billion, two hundred thirty-eight million, six hundred forty-nine thousand, nine hundred ninety-one".