949345721861 has 4 divisors (see below), whose sum is σ = 949350148032. Its totient is φ = 949341295692.

The previous prime is 949345721839. The next prime is 949345721867. The reversal of 949345721861 is 168127543949.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 949345721861 - 2³⁴ = 932165852677 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 949345721861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (949345721867) 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, 1874045 + ... + 2326098.

It is an arithmetic number, because the mean of its divisors is an integer number (237337537008).

Almost surely, 2^949345721861 is an apocalyptic number.

It is an amenable number.

949345721861 is a deficient number, since it is larger than the sum of its proper divisors (4426171).

949345721861 is a wasteful number, since it uses less digits than its factorization.

949345721861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426170.

The product of its digits is 13063680, while the sum is 59.

The spelling of 949345721861 in words is "nine hundred forty-nine billion, three hundred forty-five million, seven hundred twenty-one thousand, eight hundred sixty-one".