40529491 has 4 divisors (see below), whose sum is σ = 40542352. Its totient is φ = 40516632.

The previous prime is 40529477. The next prime is 40529497. The reversal of 40529491 is 19492504.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40529491 - 2⁵ = 40529459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40529497) 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, 1861 + ... + 9193.

It is an arithmetic number, because the mean of its divisors is an integer number (10135588).

Almost surely, 2^40529491 is an apocalyptic number.

40529491 is a deficient number, since it is larger than the sum of its proper divisors (12861).

40529491 is an equidigital number, since it uses as much as digits as its factorization.

40529491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12860.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 40529491 is about 6366.2776408196. The cubic root of 40529491 is about 343.4976075239.

The spelling of 40529491 in words is "forty million, five hundred twenty-nine thousand, four hundred ninety-one".