3990022837 has 2 divisors, whose sum is σ = 3990022838. Its totient is φ = 3990022836.

The previous prime is 3990022823. The next prime is 3990022889. The reversal of 3990022837 is 7382200993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2222745316 + 1767277521 = 47146^2 + 42039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3990022837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3990022793 and 3990022802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3990022537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995011418 + 1995011419.

It is an arithmetic number, because the mean of its divisors is an integer number (1995011419).

Almost surely, 2^3990022837 is an apocalyptic number.

It is an amenable number.

3990022837 is a deficient number, since it is larger than the sum of its proper divisors (1).

3990022837 is an equidigital number, since it uses as much as digits as its factorization.

3990022837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 3990022837 is about 63166.6275575956. The cubic root of 3990022837 is about 1586.0801398589.

The spelling of 3990022837 in words is "three billion, nine hundred ninety million, twenty-two thousand, eight hundred thirty-seven".