949453388021 has 4 divisors (see below), whose sum is σ = 949690696044. Its totient is φ = 949216080000.

The previous prime is 949453387991. The next prime is 949453388041. The reversal of 949453388021 is 120883354949.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101652568900 + 847800819121 = 318830^2 + 920761^2 .

It is a cyclic number.

It is not a de Polignac number, because 949453388021 - 2¹⁸ = 949453125877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (949453388041) 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, 118648010 + ... + 118656011.

It is an arithmetic number, because the mean of its divisors is an integer number (237422674011).

Almost surely, 2^949453388021 is an apocalyptic number.

It is an amenable number.

949453388021 is a deficient number, since it is larger than the sum of its proper divisors (237308023).

949453388021 is a wasteful number, since it uses less digits than its factorization.

949453388021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237308022.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 949453388021 in words is "nine hundred forty-nine billion, four hundred fifty-three million, three hundred eighty-eight thousand, twenty-one".