40849789 has 2 divisors, whose sum is σ = 40849790. Its totient is φ = 40849788.

The previous prime is 40849763. The next prime is 40849819. The reversal of 40849789 is 98794804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40832100 + 17689 = 6390^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 40849789 - 2¹⁹ = 40325501 is a prime.

It is a super-2 number, since 2×40849789² = 3337410522689042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40849729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20424894 + 20424895.

It is an arithmetic number, because the mean of its divisors is an integer number (20424895).

Almost surely, 2^40849789 is an apocalyptic number.

It is an amenable number.

40849789 is a deficient number, since it is larger than the sum of its proper divisors (1).

40849789 is an equidigital number, since it uses as much as digits as its factorization.

40849789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 40849789 is about 6391.3839659341. The cubic root of 40849789 is about 344.4001029019.

The spelling of 40849789 in words is "forty million, eight hundred forty-nine thousand, seven hundred eighty-nine".