40900291 has 4 divisors (see below), whose sum is σ = 41029632. Its totient is φ = 40770952.

The previous prime is 40900273. The next prime is 40900303. The reversal of 40900291 is 19200904.

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 40900291 - 2¹³ = 40892099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40900201) 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, 64195 + ... + 64828.

It is an arithmetic number, because the mean of its divisors is an integer number (10257408).

Almost surely, 2^40900291 is an apocalyptic number.

40900291 is a deficient number, since it is larger than the sum of its proper divisors (129341).

40900291 is a wasteful number, since it uses less digits than its factorization.

40900291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129340.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 40900291 is about 6395.3335331318. Note that the first 3 decimals coincide. The cubic root of 40900291 is about 344.5419700678.

The spelling of 40900291 in words is "forty million, nine hundred thousand, two hundred ninety-one".