40195823 has 4 divisors (see below), whose sum is σ = 40289088. Its totient is φ = 40102560.

The previous prime is 40195819. The next prime is 40195829. The reversal of 40195823 is 32859104.

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

It is a cyclic number.

It is not a de Polignac number, because 40195823 - 2² = 40195819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40195823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40195829) 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, 45983 + ... + 46848.

It is an arithmetic number, because the mean of its divisors is an integer number (10072272).

Almost surely, 2^40195823 is an apocalyptic number.

40195823 is a deficient number, since it is larger than the sum of its proper divisors (93265).

40195823 is an equidigital number, since it uses as much as digits as its factorization.

40195823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93264.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 40195823 is about 6340.0175867264. The cubic root of 40195823 is about 342.5523687838.

The spelling of 40195823 in words is "forty million, one hundred ninety-five thousand, eight hundred twenty-three".