7408000921 has 8 divisors (see below), whose sum is σ = 7450302600. Its totient is φ = 7365786240.

The previous prime is 7408000907. The next prime is 7408000933. The reversal of 7408000921 is 1290008047.

7408000921 = 60860² + 60861².

It can be written as a sum of positive squares in 4 ways, for example, as 2167833600 + 5240167321 = 46560^2 + 72389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7408000921 - 2⁹ = 7408000409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7408000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153015 + ... + 195523.

It is an arithmetic number, because the mean of its divisors is an integer number (931287825).

Almost surely, 2^7408000921 is an apocalyptic number.

7408000921 is the 60861-st centered square number.

It is an amenable number.

7408000921 is a deficient number, since it is larger than the sum of its proper divisors (42301679).

7408000921 is a wasteful number, since it uses less digits than its factorization.

7408000921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43499.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 7408000921 is about 86069.7445157124. The cubic root of 7408000921 is about 1949.3972207463.

Adding to 7408000921 its reverse (1290008047), we get a palindrome (8698008968).

The spelling of 7408000921 in words is "seven billion, four hundred eight million, nine hundred twenty-one", and thus it is an aban number.