7198523021 has 2 divisors, whose sum is σ = 7198523022. Its totient is φ = 7198523020.

The previous prime is 7198522997. The next prime is 7198523023. The reversal of 7198523021 is 1203258917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6954726025 + 243796996 = 83395^2 + 15614^2 .

It is a cyclic number.

It is not a de Polignac number, because 7198523021 - 2¹⁸ = 7198260877 is a prime.

Together with 7198523023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7198523023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3599261510 + 3599261511.

It is an arithmetic number, because the mean of its divisors is an integer number (3599261511).

Almost surely, 2^7198523021 is an apocalyptic number.

It is an amenable number.

7198523021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7198523021 is an equidigital number, since it uses as much as digits as its factorization.

7198523021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 7198523021 is about 84844.1101137846. The cubic root of 7198523021 is about 1930.8467224459.

The spelling of 7198523021 in words is "seven billion, one hundred ninety-eight million, five hundred twenty-three thousand, twenty-one".