7485997993 has 4 divisors (see below), whose sum is σ = 7570110420. Its totient is φ = 7401885568.

The previous prime is 7485997973. The next prime is 7485998021. The reversal of 7485997993 is 3997995847.

It is a happy number.

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 1526621184 + 5959376809 = 39072^2 + 77197^2 .

It is a cyclic number.

It is not a de Polignac number, because 7485997993 - 2²¹ = 7483900841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7485997973) 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, 42056080 + ... + 42056257.

It is an arithmetic number, because the mean of its divisors is an integer number (1892527605).

Almost surely, 2^7485997993 is an apocalyptic number.

It is an amenable number.

7485997993 is a deficient number, since it is larger than the sum of its proper divisors (84112427).

7485997993 is an equidigital number, since it uses as much as digits as its factorization.

7485997993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84112426.

The product of its digits is 154314720, while the sum is 70.

The square root of 7485997993 is about 86521.6619870423. The cubic root of 7485997993 is about 1956.2149283141.

The spelling of 7485997993 in words is "seven billion, four hundred eighty-five million, nine hundred ninety-seven thousand, nine hundred ninety-three".