940566553 has 4 divisors (see below), whose sum is σ = 940657680. Its totient is φ = 940475428.

The previous prime is 940566511. The next prime is 940566581. The reversal of 940566553 is 355665049.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 940566553 - 2⁹ = 940566041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (940567553) 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, 27763 + ... + 51496.

It is an arithmetic number, because the mean of its divisors is an integer number (235164420).

Almost surely, 2^940566553 is an apocalyptic number.

It is an amenable number.

940566553 is a deficient number, since it is larger than the sum of its proper divisors (91127).

940566553 is a wasteful number, since it uses less digits than its factorization.

940566553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91126.

The product of its (nonzero) digits is 486000, while the sum is 43.

The square root of 940566553 is about 30668.6575024079. The cubic root of 940566553 is about 979.7828732496.

The spelling of 940566553 in words is "nine hundred forty million, five hundred sixty-six thousand, five hundred fifty-three".