40299949 has 2 divisors, whose sum is σ = 40299950. Its totient is φ = 40299948.

The previous prime is 40299863. The next prime is 40299953. The reversal of 40299949 is 94999204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35784324 + 4515625 = 5982^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 40299949 - 2²⁵ = 6745517 is a prime.

It is a super-3 number, since 3×40299949³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40299899 and 40299908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40299989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20149974 + 20149975.

It is an arithmetic number, because the mean of its divisors is an integer number (20149975).

Almost surely, 2^40299949 is an apocalyptic number.

It is an amenable number.

40299949 is a deficient number, since it is larger than the sum of its proper divisors (1).

40299949 is an equidigital number, since it uses as much as digits as its factorization.

40299949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 40299949 is about 6348.2240823714. The cubic root of 40299949 is about 342.8479040748.

The spelling of 40299949 in words is "forty million, two hundred ninety-nine thousand, nine hundred forty-nine".