949392721 has 4 divisors (see below), whose sum is σ = 949484272. Its totient is φ = 949301172.

The previous prime is 949392713. The next prime is 949392733. The reversal of 949392721 is 127293949.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 127293949 = 37 ⋅3440377.

It is a cyclic number.

It is not a de Polignac number, because 949392721 - 2³ = 949392713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (949392791) 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, 27891 + ... + 51736.

It is an arithmetic number, because the mean of its divisors is an integer number (237371068).

Almost surely, 2^949392721 is an apocalyptic number.

It is an amenable number.

949392721 is a deficient number, since it is larger than the sum of its proper divisors (91551).

949392721 is a wasteful number, since it uses less digits than its factorization.

949392721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91550.

The product of its digits is 244944, while the sum is 46.

The square root of 949392721 is about 30812.2170737518. The cubic root of 949392721 is about 982.8380597205.

The spelling of 949392721 in words is "nine hundred forty-nine million, three hundred ninety-two thousand, seven hundred twenty-one".