7393490721 has 12 divisors (see below), whose sum is σ = 10686574080. Its totient is φ = 4925722680.

The previous prime is 7393490693. The next prime is 7393490771. The reversal of 7393490721 is 1270943937.

7393490721 is a `hidden beast` number, since 7 + 3 + 93 + 490 + 72 + 1 = 666.

It is not a de Polignac number, because 7393490721 - 2⁷ = 7393490593 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7393490771) 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 11 ways as a sum of consecutive naturals, for example, 258241 + ... + 285438.

It is an arithmetic number, because the mean of its divisors is an integer number (890547840).

Almost surely, 2^7393490721 is an apocalyptic number.

It is an amenable number.

7393490721 is a deficient number, since it is larger than the sum of its proper divisors (3293083359).

7393490721 is a wasteful number, since it uses less digits than its factorization.

7393490721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545196 (or 545193 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 7393490721 is about 85985.4099309877. The cubic root of 7393490721 is about 1948.1236143582.

The spelling of 7393490721 in words is "seven billion, three hundred ninety-three million, four hundred ninety thousand, seven hundred twenty-one".