40223789 has 2 divisors, whose sum is σ = 40223790. Its totient is φ = 40223788.

The previous prime is 40223749. The next prime is 40223831. The reversal of 40223789 is 98732204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24581764 + 15642025 = 4958^2 + 3955^2 .

It is a cyclic number.

It is not a de Polignac number, because 40223789 - 2¹² = 40219693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40223749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20111894 + 20111895.

It is an arithmetic number, because the mean of its divisors is an integer number (20111895).

Almost surely, 2^40223789 is an apocalyptic number.

It is an amenable number.

40223789 is a deficient number, since it is larger than the sum of its proper divisors (1).

40223789 is an equidigital number, since it uses as much as digits as its factorization.

40223789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 40223789 is about 6342.2227176283. Note that the first 3 decimals coincide. The cubic root of 40223789 is about 342.6317932778.

The spelling of 40223789 in words is "forty million, two hundred twenty-three thousand, seven hundred eighty-nine".