40345999 has 2 divisors, whose sum is σ = 40346000. Its totient is φ = 40345998.

The previous prime is 40345967. The next prime is 40346039. The reversal of 40345999 is 99954304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40345999 - 2⁵ = 40345967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40345399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20172999 + 20173000.

It is an arithmetic number, because the mean of its divisors is an integer number (20173000).

Almost surely, 2^40345999 is an apocalyptic number.

40345999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40345999 is an equidigital number, since it uses as much as digits as its factorization.

40345999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 40345999 is about 6351.8500454592. The cubic root of 40345999 is about 342.9784430009.

The spelling of 40345999 in words is "forty million, three hundred forty-five thousand, nine hundred ninety-nine".