40369999 has 2 divisors, whose sum is σ = 40370000. Its totient is φ = 40369998.

The previous prime is 40369993. The next prime is 40370017. The reversal of 40369999 is 99996304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40369999 - 2¹³ = 40361807 is a prime.

40369999 is a modest number, since divided by 9999 gives 4036 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40369993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20184999 + 20185000.

It is an arithmetic number, because the mean of its divisors is an integer number (20185000).

Almost surely, 2^40369999 is an apocalyptic number.

40369999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40369999 is an equidigital number, since it uses as much as digits as its factorization.

40369999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 40369999 is about 6353.7389779562. The cubic root of 40369999 is about 343.0464369466.

The spelling of 40369999 in words is "forty million, three hundred sixty-nine thousand, nine hundred ninety-nine".