7198491021 has 8 divisors (see below), whose sum is σ = 9601936224. Its totient is φ = 4797019920.

The previous prime is 7198491011. The next prime is 7198491023. The reversal of 7198491021 is 1201948917.

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

It is a de Polignac number, because none of the positive numbers 2^k-7198491021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7198491023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484995 + ... + 499616.

It is an arithmetic number, because the mean of its divisors is an integer number (1200242028).

Almost surely, 2^7198491021 is an apocalyptic number.

It is an amenable number.

7198491021 is a deficient number, since it is larger than the sum of its proper divisors (2403445203).

7198491021 is a wasteful number, since it uses less digits than its factorization.

7198491021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987051.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 7198491021 is about 84843.9215324233. The cubic root of 7198491021 is about 1930.8438613411.

The spelling of 7198491021 in words is "seven billion, one hundred ninety-eight million, four hundred ninety-one thousand, twenty-one".