40129193 has 4 divisors (see below), whose sum is σ = 43216068. Its totient is φ = 37042320.

The previous prime is 40129189. The next prime is 40129207. The reversal of 40129193 is 39192104.

It is a happy number.

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 6801664 + 33327529 = 2608^2 + 5773^2 .

It is a cyclic number.

It is not a de Polignac number, because 40129193 - 2² = 40129189 is a prime.

It is a super-2 number, since 2×40129193² = 3220704261662498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40129123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1543418 + ... + 1543443.

It is an arithmetic number, because the mean of its divisors is an integer number (10804017).

Almost surely, 2^40129193 is an apocalyptic number.

It is an amenable number.

40129193 is a deficient number, since it is larger than the sum of its proper divisors (3086875).

40129193 is a wasteful number, since it uses less digits than its factorization.

40129193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086874.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 40129193 is about 6334.7606900340. The cubic root of 40129193 is about 342.3629885142.

The spelling of 40129193 in words is "forty million, one hundred twenty-nine thousand, one hundred ninety-three".