2231990939 has 2 divisors, whose sum is σ = 2231990940. Its totient is φ = 2231990938.

The previous prime is 2231990927. The next prime is 2231990941. The reversal of 2231990939 is 9390991322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2231990939 - 2¹² = 2231986843 is a prime.

It is a super-3 number, since 3×2231990939³ (a number of 29 digits) contains 333 as substring.

Together with 2231990941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2231990893 and 2231990902.

It is not a weakly prime, because it can be changed into another prime (2231990989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115995469 + 1115995470.

It is an arithmetic number, because the mean of its divisors is an integer number (1115995470).

Almost surely, 2^2231990939 is an apocalyptic number.

2231990939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231990939 is an equidigital number, since it uses as much as digits as its factorization.

2231990939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 47.

The square root of 2231990939 is about 47243.9513482943. The cubic root of 2231990939 is about 1306.8652469680.

The spelling of 2231990939 in words is "two billion, two hundred thirty-one million, nine hundred ninety thousand, nine hundred thirty-nine".