40691199 has 4 divisors (see below), whose sum is σ = 54254936. Its totient is φ = 27127464.

The previous prime is 40691159. The next prime is 40691207. The reversal of 40691199 is 99119604.

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

It is not a de Polignac number, because 40691199 - 2⁹ = 40690687 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 (40691159) 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, 6781864 + ... + 6781869.

It is an arithmetic number, because the mean of its divisors is an integer number (13563734).

Almost surely, 2^40691199 is an apocalyptic number.

40691199 is a deficient number, since it is larger than the sum of its proper divisors (13563737).

40691199 is a wasteful number, since it uses less digits than its factorization.

40691199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13563736.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 40691199 is about 6378.9653549772. The cubic root of 40691199 is about 343.9538399167.

The spelling of 40691199 in words is "forty million, six hundred ninety-one thousand, one hundred ninety-nine".