940209541 has 4 divisors (see below), whose sum is σ = 940332832.
Its totient is φ = 940086252.
The previous prime is 940209539. The next prime is 940209587. The reversal of 940209541 is 145902049.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145902049 = 347 ⋅420467.
It is a cyclic number.
It is not a de Polignac number, because 940209541 - 21 = 940209539 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 940209497 and 940209506.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (940209511) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49395 + ... + 65728.
It is an arithmetic number, because the mean of its divisors is an integer number (235083208).
It is a 7626-hyperperfect number.
Almost surely, 2940209541 is an apocalyptic number.
It is an amenable number.
940209541 is a deficient number, since it is larger than the sum of its proper divisors (123291).
940209541 is a wasteful number, since it uses less digits than its factorization.
940209541 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 123290.
The product of its (nonzero) digits is 12960, while the sum is 34.
The square root of 940209541 is about 30662.8364800127.
The cubic root of 940209541 is about 979.6588917661.
The spelling of 940209541 in words is "nine hundred forty million, two hundred nine thousand, five hundred forty-one".