6920742481 has 9 divisors (see below), whose sum is σ = 7236727771. Its totient is φ = 6618010432.

The previous prime is 6920742431. The next prime is 6920742511. The reversal of 6920742481 is 1842470296.

The square root of 6920742481 is 83191.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 34398225 + 6886344256 = 5865^2 + 82984^2 .

It is not a de Polignac number, because 6920742481 - 2¹⁷ = 6920611409 is a prime.

It is a super-2 number, since 2×6920742481² = 95793352976636070722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6920742431) 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 8 ways as a sum of consecutive naturals, for example, 1911585 + ... + 1915201.

Almost surely, 2^6920742481 is an apocalyptic number.

6920742481 is the 83191-st square number.

6920742481 is the 41596-th centered octagonal number.

It is an amenable number.

6920742481 is a deficient number, since it is larger than the sum of its proper divisors (315985290).

6920742481 is an frugal number, since it uses more digits than its factorization.

6920742481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7280 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The cubic root of 6920742481 is about 1905.6840387872.

The spelling of 6920742481 in words is "six billion, nine hundred twenty million, seven hundred forty-two thousand, four hundred eighty-one".