7481021999 has 8 divisors (see below), whose sum is σ = 8264421120. Its totient is φ = 6714840600.

The previous prime is 7481021987. The next prime is 7481022037. The reversal of 7481021999 is 9991201847.

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 7481021999 - 2⁴ = 7481021983 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 (7481021939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4303517 + ... + 4305254.

It is an arithmetic number, because the mean of its divisors is an integer number (1033052640).

Almost surely, 2^7481021999 is an apocalyptic number.

7481021999 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

7481021999 is a deficient number, since it is larger than the sum of its proper divisors (783399121).

7481021999 is a wasteful number, since it uses less digits than its factorization.

7481021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8608861.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 7481021999 is about 86492.9014370544. The cubic root of 7481021999 is about 1955.7813957675.

The spelling of 7481021999 in words is "seven billion, four hundred eighty-one million, twenty-one thousand, nine hundred ninety-nine".