40906193 has 4 divisors (see below), whose sum is σ = 41166900. Its totient is φ = 40645488.

The previous prime is 40906189. The next prime is 40906249. The reversal of 40906193 is 39160904.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20539024 + 20367169 = 4532^2 + 4513^2 .

It is a cyclic number.

It is not a de Polignac number, because 40906193 - 2² = 40906189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40906123) 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, 130118 + ... + 130431.

It is an arithmetic number, because the mean of its divisors is an integer number (10291725).

Almost surely, 2^40906193 is an apocalyptic number.

It is an amenable number.

40906193 is a deficient number, since it is larger than the sum of its proper divisors (260707).

40906193 is a wasteful number, since it uses less digits than its factorization.

40906193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260706.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 40906193 is about 6395.7949466818. The cubic root of 40906193 is about 344.5585419866.

The spelling of 40906193 in words is "forty million, nine hundred six thousand, one hundred ninety-three".