6921740297 has 2 divisors, whose sum is σ = 6921740298. Its totient is φ = 6921740296.

The previous prime is 6921740239. The next prime is 6921740303. The reversal of 6921740297 is 7920471296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4179751801 + 2741988496 = 64651^2 + 52364^2 .

It is a cyclic number.

It is not a de Polignac number, because 6921740297 - 2²⁴ = 6904963081 is a prime.

It is a super-2 number, since 2×6921740297² = 95820977478227296418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6921740237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3460870148 + 3460870149.

It is an arithmetic number, because the mean of its divisors is an integer number (3460870149).

Almost surely, 2^6921740297 is an apocalyptic number.

It is an amenable number.

6921740297 is a deficient number, since it is larger than the sum of its proper divisors (1).

6921740297 is an equidigital number, since it uses as much as digits as its factorization.

6921740297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 6921740297 is about 83196.9969229659. The cubic root of 6921740297 is about 1905.7756200326.

The spelling of 6921740297 in words is "six billion, nine hundred twenty-one million, seven hundred forty thousand, two hundred ninety-seven".