40646999 has 4 divisors (see below), whose sum is σ = 40751880. Its totient is φ = 40542120.

The previous prime is 40646987. The next prime is 40647059. The reversal of 40646999 is 99964604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40646999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40646939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51857 + ... + 52634.

It is an arithmetic number, because the mean of its divisors is an integer number (10187970).

Almost surely, 2^40646999 is an apocalyptic number.

40646999 is a deficient number, since it is larger than the sum of its proper divisors (104881).

40646999 is a wasteful number, since it uses less digits than its factorization.

40646999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104880.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 40646999 is about 6375.4999019685. The cubic root of 40646999 is about 343.8292571406.

The spelling of 40646999 in words is "forty million, six hundred forty-six thousand, nine hundred ninety-nine".