920206913 has 4 divisors (see below), whose sum is σ = 923873328. Its totient is φ = 916540500.

The previous prime is 920206891. The next prime is 920206919. The reversal of 920206913 is 319602029.

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: 319602029 = 487 ⋅656267.

It is a cyclic number.

It is not a de Polignac number, because 920206913 - 2⁶ = 920206849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 920206913.

It is not an unprimeable number, because it can be changed into a prime (920206919) 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, 1832831 + ... + 1833332.

It is an arithmetic number, because the mean of its divisors is an integer number (230968332).

Almost surely, 2^920206913 is an apocalyptic number.

It is an amenable number.

920206913 is a deficient number, since it is larger than the sum of its proper divisors (3666415).

920206913 is a wasteful number, since it uses less digits than its factorization.

920206913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666414.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 920206913 is about 30334.9124442448. The cubic root of 920206913 is about 972.6617342576.

The spelling of 920206913 in words is "nine hundred twenty million, two hundred six thousand, nine hundred thirteen".