909864745939 has 4 divisors (see below), whose sum is σ = 910207189224. Its totient is φ = 909522302656.

The previous prime is 909864745901. The next prime is 909864745961. The reversal of 909864745939 is 939547468909.

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 909864745939 - 2¹⁵ = 909864713171 is a prime.

It is a super-3 number, since 3×909864745939³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (909864748939) 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, 171217657 + ... + 171222970.

It is an arithmetic number, because the mean of its divisors is an integer number (227551797306).

Almost surely, 2^909864745939 is an apocalyptic number.

909864745939 is a deficient number, since it is larger than the sum of its proper divisors (342443285).

909864745939 is a wasteful number, since it uses less digits than its factorization.

909864745939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342443284.

The product of its (nonzero) digits is 529079040, while the sum is 73.

The spelling of 909864745939 in words is "nine hundred nine billion, eight hundred sixty-four million, seven hundred forty-five thousand, nine hundred thirty-nine".